Secularisation in Britain Today: Is Religion Disappearing?

Empty pews. Fewer church weddings. School assemblies without hymns or prayers. Sundays dominated by shopping, sport, streaming services and family activities rather than collective worship.

At first sight, secularisation in Britain appears unmistakable. Religious belief has declined, regular church attendance is low, and religious organisations no longer exercise the authority they once possessed over education, marriage, morality, politics and family life.

However, A Level Sociology requires us to move beyond simple statements such as “religion is disappearing”.

The more useful sociological question is:

In what ways has religion declined, and in what ways does it continue to influence British society?

Britain is undoubtedly less conventionally Christian than it was. However, religion has not vanished completely. It has become more private, more diverse and less closely connected to the traditional Christian churches.

Some religious organisations are shrinking, while other faith communities and new forms of spirituality remain active.

Secularisation may therefore be less about the complete disappearance of religion and more about a transformation in religion’s social position.

What Is Secularisation?

Secularisation refers to the process through which religion loses social significance.

Bryan Wilson defined secularisation as a process in which religious beliefs, practices and institutions lose their influence over society.

Secularisation can take place at several different levels.

At the level of the individual, fewer people may:

• believe in God;

• identify with a religion;

• attend religious services;

• follow religious rules;

• allow religion to influence their everyday decisions.

At the organisational level, churches may experience:

• falling membership;

• declining attendance;

• fewer ministers;

• reduced income;

• church closures;

• congregations merging.

At the institutional level, religion may lose influence over:

• education;

• marriage;

• family life;

• politics;

• the law;

• healthcare;

• public morality.

These different dimensions are connected, but they are not identical.

A person may believe in God without attending church. A society may have low levels of religious participation while still maintaining an established Church. A family may choose a faith school because of its reputation rather than because of its religious teaching.

This is why secularisation cannot be measured using only one statistic.

Britain Is Becoming Less Christian

One of the clearest signs of secularisation is the decline in the number of people identifying themselves as Christian.

In the 2021 Census for England and Wales, 46.2% of the population described themselves as Christian. This was the first census in which fewer than half of the population selected Christianity.

The figure had fallen from:

• 71.7% in 2001;

• 59.3% in 2011;

• 46.2% in 2021.

At the same time, the proportion of people reporting that they had no religion increased from:

• 14.8% in 2001;

• 25.2% in 2011;

• 37.2% in 2021.

This represents a significant cultural change within a relatively short period.

Christian identity was once treated almost as the automatic or socially expected answer. Someone might describe themselves as Church of England even if they rarely attended church, knew little about Christian teaching and did not organise their life around religious beliefs.

That automatic cultural identification is becoming much weaker.

Younger people are also considerably less likely to identify as Christian than older people. This supports the idea of generational replacement.

Older generations, who were more likely to have been raised within Christianity, are gradually being replaced by younger generations who are less likely to have been socialised into religious belief and practice.

The decline of religion is therefore not caused only by people abandoning religion during adulthood. Many young people never develop a strong religious identity in the first place.

Church Attendance: A Long-Term Decline

Church attendance provides another important measure of secularisation.

Only a small minority of British adults now attend a Christian service every week. Even among people who describe themselves as Christian, regular attendance is far from universal.

This reveals an important distinction between religious identity and religious practice.

Someone may identify as Christian because of:

• their family background;

• their baptism;

• the school they attended;

• cultural traditions;

• national identity;

• Christmas and Easter customs.

However, that person may rarely attend church except for a wedding, funeral, christening or Christmas service.

There has been some recovery in Church of England attendance since the disruption caused by the COVID-19 pandemic. However, this recovery does not reverse the much longer historical decline.

A balanced sociological conclusion would therefore be:

Church attendance has declined substantially over the long term. Although some churches have experienced recent growth or recovery, regular attendance remains low compared with Britain’s total population and with historical levels.

What Happened to the Church Wedding?

Marriage provides one of the clearest everyday examples of institutional secularisation.

Church weddings were once treated as the normal, respectable or expected way to marry. Even couples who were not regular worshippers often assumed that they would marry before a priest or minister.

Today, couples can marry in:

• register offices;

• hotels;

• country houses;

• barns;

• castles;

• gardens;

• specially licensed wedding venues.

Many couples now create highly personalised ceremonies without prayers, hymns or explicitly religious promises.

In England and Wales, only around 17% of marriages in 2022 were registered as religious ceremonies. The remaining 83% were civil ceremonies.

In 1992, civil ceremonies accounted for just over half of marriages. The change over approximately 30 years has therefore been considerable.

Getting married in church has not disappeared, but it has changed from the expected choice into one option within a large and increasingly commercial wedding market.

This supports the sociological idea of structural differentiation.

Structural differentiation occurs when institutions become more specialised and increasingly separate from one another.

Marriage no longer depends upon the Church for its legal recognition, organisation or social approval. The legal, romantic, commercial and celebratory elements of marriage can all be provided by non-religious institutions.

Religion has lost much of its former monopoly over marriage.

A Personal Reflection from Education

Across more than four decades in education, I have seen a noticeable change in the character of school assemblies.

Earlier in my career, assemblies were more likely to include:

• hymns;

• prayers;

• Bible readings;

• explicitly Christian stories;

• religious messages about behaviour and morality.

Even schools without a formal religious designation often followed a recognisably Christian pattern.

Over time, assemblies increasingly began to focus on:

• school values;

• citizenship;

• personal achievement;

• wellbeing;

• equality;

• safeguarding;

• charity;

• respect;

• events in the wider world.

This does not mean that schools have stopped teaching values.

In many ways, schools now discuss ethical, social and personal issues more openly than they once did. However, those values are less likely to be justified through Christian authority.

A message such as “care for other people” might once have been explained through the parable of the Good Samaritan.

Today, the same message might be discussed through empathy, human rights, community responsibility, inclusion or mental wellbeing.

This is another example of structural differentiation. Schools continue to perform moral and socialising functions, but they do not always depend upon religion to justify those functions.

My observation is personal rather than a national scientific measurement. Nevertheless, it reflects a cultural change that national statistics alone may not fully capture.

Have Church Schools Disappeared?

The position of faith schools presents an important challenge to an overly simple secularisation argument.

It would be inaccurate to suggest that church schools have almost disappeared.

Approximately one-third of state-funded schools in England continue to have a religious designation. The Church of England remains one of the country’s largest providers of education, working with thousands of schools and educating more than one million children.

Religious Education also remains part of the curriculum.

Daily collective worship is still a legal requirement in state-funded schools, although the way it is interpreted and delivered varies considerably.

This creates an interesting contradiction.

British society may be becoming less religious at the level of personal belief and church attendance, while religion remains embedded within the structure of the education system.

Parents may choose a church school because:

• they value its religious ethos;

• they believe it provides strong discipline;

• they appreciate its pastoral support;

• it has a good academic reputation;

• it is the nearest suitable school;

• it has facilities that meet their child’s needs.

Attendance at a faith school cannot automatically be treated as evidence of strong religious commitment.

A family may use a religious institution for mainly educational or practical reasons.

This distinction between the religious identity of an institution and the motives of the people using it is valuable in an A Level Sociology evaluation.

Has the Technological Worldview Replaced Religion?

Steve Bruce argues that the growth of a technological worldview has contributed to secularisation.

In a traditional religious worldview, unexplained events might be understood through:

• God;

• fate;

• sin;

• miracles;

• blessings;

• punishment;

• supernatural forces.

In a technological worldview, people expect events to have rational causes that can be investigated, tested and controlled.

When illness occurs, most people consult doctors.

When crops fail, scientists examine rainfall, soil conditions, pests, disease and climate.

When an aircraft crashes, investigators examine engineering, maintenance records, weather conditions and human decisions.

When a student does not understand a topic, they may search online, watch an educational video, use a learning platform or ask an artificial intelligence system.

Science and technology have become extremely successful at explaining and controlling the physical world.

This has reduced the need for supernatural explanations in many areas of everyday life.

Max Weber described a related process as the disenchantment of the world.

The world becomes increasingly understood through:

• evidence;

• calculation;

• prediction;

• scientific laws;

• technical control.

Mystery and supernatural explanations become less important.

However, it would be too strong to claim that technology has completely replaced religion.

Science can explain how a disease develops, but it may not tell a person how to cope emotionally with a terminal diagnosis.

Technology can calculate the estimated age of the universe, but it cannot necessarily determine whether human life has a purpose.

Artificial intelligence can provide information about bereavement, but some people may still turn to religious communities, rituals and beliefs when facing death.

The technological worldview has largely displaced religion as the dominant explanation of the physical world.

It has not necessarily answered every spiritual, moral or existential question.

The Declining Influence of Religion on Social Institutions

Secularisation can also be seen in the declining authority of religious organisations over major areas of social life.

The Family

People increasingly form relationships, cohabit, marry, separate and raise children without seeking religious approval.

Marriage is less closely connected to the Church, while divorce, cohabitation, same-sex relationships and family diversity have become more widely accepted.

Religious organisations still express views about family life, but they no longer possess an uncontested right to define the acceptable family.

Education

Religious organisations remain important providers of schools.

However, education is increasingly shaped by:

• science;

• employment;

• technology;

• citizenship;

• equality;

• safeguarding;

• examination requirements;

• preparation for a diverse society.

Schools may still teach moral values, but those values are not always presented as religious commandments.

Politics

Politicians may express religious beliefs, but government policies are usually defended using:

• evidence;

• economics;

• individual rights;

• public opinion;

• social consequences;

• scientific advice.

Policies are rarely justified solely through scripture.

However, Britain has not experienced a complete separation of religion and the state.

The Church of England remains the established Church, and bishops continue to sit in the House of Lords as Lords Spiritual.

Religion therefore retains some formal political influence, even though its wider cultural authority has declined.

Morality

Religious organisations no longer possess an uncontested right to define respectable behaviour.

Attitudes towards relationships, sexuality, gender roles, divorce and family life have become more individualised and pluralistic.

This does not mean that religious leaders have no influence.

They continue to contribute to debates about:

• poverty;

• war;

• migration;

• assisted dying;

• abortion;

• climate change;

• inequality;

• social justice.

The important change is that they now speak as voices within a crowded public debate rather than as the unquestioned moral authorities of the nation.

Will the Methodist Church Disappear by 2030?

The decline of Methodism provides a dramatic illustration of secularisation.

Methodism once had enormous influence in Britain, particularly within industrial and working-class communities.

Methodist chapels were not only places of worship. They were also centres of:

• education;

• music;

• mutual support;

• community organisation;

• political discussion;

• social reform.

The Methodist Church now has far fewer members than it did historically. Many congregations are ageing, local chapels have closed, and the number of ministers has declined.

However, it would be inaccurate to predict the complete disappearance of the Methodist Church by 2030.

What may disappear are particular local congregations and chapel buildings.

Smaller congregations may merge. Several churches may share one minister. Buildings may be converted into homes, offices, shops or community centres.

Worship may increasingly be organised through:

• larger Methodist circuits;

• partnerships with other denominations;

• shared church buildings;

• online services;

• community projects;

• less formal styles of worship.

This creates an important distinction between three possible developments.

Denominational extinction would mean that the Methodist Church ceased to exist as an organisation.

Organisational contraction means fewer members, ministers, congregations and buildings.

Local disappearance means that Methodism becomes invisible in some towns and villages even though the national denomination continues.

By 2030, further contraction and more local closures are plausible.

Complete disappearance is not.

Dramatic predictions may attract attention, but sociological claims must be supported by evidence.

Why Has Secularisation Happened?

No single explanation is sufficient.

Several social changes have contributed to the decline of traditional religion.

Rationalisation

Scientific explanations, bureaucratic organisations and technological systems have replaced religious explanations in many areas of life.

People increasingly expect events to have natural, measurable and testable causes.

Structural Differentiation

Functions once controlled by churches are now performed by specialist institutions.

For example:

• schools provide education;

• hospitals treat illness;

• governments provide welfare;

• courts regulate marriage and divorce;

• counsellors provide emotional support;

• charities provide organised assistance.

Religion is no longer responsible for all these areas of social life.

Social and Geographical Mobility

People move home, change jobs and travel more frequently.

This can weaken the close local communities that once reinforced religious participation.

A village church may have been central to community life when generations of the same families lived in one area. That influence is harder to maintain in a more mobile society.

Religious Diversity

Peter Berger argued that religious diversity can weaken a single religion’s plausibility structure.

A plausibility structure is the social support that makes a belief system appear natural, credible and unquestionable.

When people encounter many different religions and belief systems, it becomes more difficult for one religion to present itself as the only possible truth.

Pluralism can therefore weaken religious certainty.

Individualism

Modern society encourages people to make personal choices about:

• identity;

• relationships;

• morality;

• lifestyle;

• spirituality;

• belief.

Individuals are less willing to accept religious teachings simply because they have been inherited from parents or supported by tradition.

Changing Childhood Socialisation

Children who are not taken to church are less likely to take their own children to church.

Religious decline can therefore reproduce itself across generations.

When religious socialisation weakens, fewer young adults possess the habits, knowledge and emotional attachment required to continue regular participation.

Consumer Culture and Competing Activities

Church attendance now competes with:

• work;

• shopping;

• sport;

• travel;

• entertainment;

• family activities;

• online media;

• computer games;

• streaming services.

Sunday no longer has the distinctive social character it once possessed.

Together, these changes help explain the long-term decline of traditional Christian participation.

Has Religion Declined or Merely Changed?

Critics of the secularisation thesis argue that church attendance statistics may miss important forms of religious and spiritual life.

Grace Davie used the phrase believing without belonging.

Some people continue to:

• believe in God;

• pray;

• hold spiritual beliefs;

• value Christian traditions;

• seek religious ceremonies at important moments.

However, they do not regularly attend church or belong to a religious organisation.

People may engage with religion particularly during:

• birth;

• marriage;

• illness;

• bereavement;

• national tragedy;

• Christmas;

• Easter.

Religion has also become more diverse.

While Christian identification has declined, Britain’s Muslim, Hindu and Sikh populations have grown.

Some Pentecostal, evangelical and migrant churches have active and expanding congregations.

At the same time, some people explore:

• meditation;

• mindfulness;

• pilgrimage;

• astrology;

• alternative therapies;

• personalised spirituality.

They may participate in spiritual activities without joining a conventional church.

This can be described as a movement from religious obligation towards spiritual consumption.

People no longer necessarily accept a complete package of beliefs from a single religious organisation. Instead, they may select particular ideas and practices that suit their personal needs.

Britain may therefore be becoming less traditionally religious without becoming completely non-spiritual.

Methodological Problems When Measuring Secularisation

A high-quality A Level Sociology answer should evaluate the evidence.

Census data measure religious identification, not necessarily belief or practice.

Someone selecting “Christian” may never attend church.

Attendance surveys often depend on self-reporting. Respondents may exaggerate their participation or interpret the term “attendance” differently.

Church records may also measure different things, including:

• official membership;

• average weekly attendance;

• baptisms;

• confirmations;

• participation in festivals;

• online worship.

National statistics can hide significant regional, class, ethnic and age differences.

London is not religiously identical to rural Wales. A growing Pentecostal congregation may have a very different experience from a small rural Methodist chapel.

Researchers must also distinguish carefully between:

• Britain;

• Great Britain;

• the United Kingdom;

• England;

• England and Wales.

Different surveys cover different geographical areas.

No single statistic can prove or disprove secularisation.

The strongest conclusion comes from examining several indicators together, including:

• religious identity;

• belief;

• attendance;

• membership;

• religious ceremonies;

• institutional influence.

A Practical A Level Sociology Investigation

Students can investigate secularisation within their own local area.

Begin by examining local places of worship.

Are they:

• active churches;

• shared buildings;

• community centres;

• converted homes;

• offices;

• shops;

• closed and unused?

Changes in building use can provide evidence of organisational decline, although observation alone cannot reveal the beliefs of local residents.

Students could also compare wedding venues advertised locally.

How many promote church weddings, and how many present marriage as a personalised lifestyle event?

Another possibility would be to interview relatives from different generations about:

• school assemblies;

• Sunday activities;

• church attendance;

• weddings;

• religious upbringing;

• attitudes towards belief.

This could produce valuable qualitative evidence about social change.

However, the research would have limitations.

The sample would probably be small and unrepresentative. Memories may be selective, while family members may give socially desirable answers.

Nevertheless, a local investigation can help students connect abstract sociological theories with lived experience.

How to Structure an A Level Essay on Secularisation

A strong essay should begin by defining secularisation.

It should explain that secularisation may involve declining:

• belief;

• practice;

• membership;

• organisational strength;

• institutional influence.

The first section could use evidence about falling Christian identification and the growth of “no religion”.

The second section could examine church attendance and the decline of religious ceremonies such as church weddings.

The third section could discuss rationalisation, the technological worldview and structural differentiation.

The fourth section should evaluate the secularisation thesis using:

• faith schools;

• the established Church;

• religious diversity;

• private belief;

• believing without belonging;

• new forms of spirituality.

The conclusion should make a clear judgement rather than simply repeating the evidence.

A strong overall judgement might be:

Britain has experienced substantial secularisation, particularly in traditional Christian identification, church attendance and the authority of religious institutions. However, religion has not disappeared. It survives through faith schools, constitutional arrangements, minority faith communities, private belief and changing forms of spirituality. Britain is best described as less conventionally Christian, more religiously diverse and more individualised.

Conclusion: Religion Is Losing Its Monopoly, Not Vanishing

The empty church pew is a powerful symbol of modern Britain, but it does not tell the entire story.

Traditional Christian practice has declined.

Fewer people identify as Christian, only a small minority attend church weekly, and religious weddings have become unusual rather than normal.

The technological worldview has become dominant. Science, medicine, education and digital technology now answer many questions and perform many functions that were once closely associated with religious institutions.

However, religion continues to shape:

• schools;

• communities;

• ceremonies;

• political structures;

• personal identities.

Religion may become less visible in one place while becoming more important in another.

It may decline as an organised institution while surviving as private belief, cultural tradition or individual spirituality.

The most convincing sociological conclusion is not that Britain has become completely non-religious.

It is that religion has lost its monopoly.

People now have more explanations, more identities and more choices than previous generations.

Religion must compete with science, individualism, consumer culture, alternative spiritualities and many different worldviews.

Secularisation is real, but it is uneven.

The future may contain fewer traditional churches and smaller Christian denominations. It may also contain greater religious diversity, new forms of worship and continuing debates about meaning, morality and belonging.

Religion in Britain is not simply disappearing.

It is changing its shape.

Building an A Level Platform Game Project — Part 6: Adding Enemies, Moving Hazards and Advanced Interaction

 

Building an A Level Platform Game Project — Part 6: Adding Enemies, Moving Hazards and Advanced Interactions

In Part 1, we planned the platform game and set realistic success criteria.

In Part 2, we created the game window and added basic player movement.

In Part 3, we added gravity and jumping.

In Part 4, we added platforms and collision detection.

In Part 5, we turned platforms into proper levels with routes, start points, finish points, collectables, hazards, score and lives.

Now the game is ready for the next step.

We need to make the level feel alive.

A static platform game can still be useful, but once we add enemies, moving hazards and more advanced interactions, the project becomes much more interesting. The player is no longer simply jumping from platform to platform. They now have to react, time their movements, avoid danger and make decisions.

For an A Level Computer Science project, this is an excellent stage. It introduces movement patterns, simple artificial intelligence, state changes, timing, object lists, collision detection, testing and balancing difficulty.

It is also the stage where students need to be careful.

Adding enemies and moving hazards can make the game better, but it can also make the project much harder to finish. The aim is not to add dozens of complicated features. The aim is to add a small number of well-planned interactions that can be tested and explained clearly.

Why Moving Objects Change the Game

So far, most of the game world has been static.

Platforms stay in one place.
Collectables wait to be collected.
Hazards sit in fixed positions.
The finish point waits for the player.

That is fine for an early level, but it can become predictable.

Moving hazards and enemies create challenge because the player must respond to change.

A moving enemy can patrol a platform.
A moving spike block can travel back and forth.
A falling object can appear at intervals.
A moving platform can carry the player across a gap.
A timed laser can switch on and off.

These features make the game feel more dynamic.

More importantly, they introduce useful programming problems.

The Aim for Part 6

The aim of this stage is:

Add enemies, moving hazards and more advanced interactions to make the level more challenging and engaging.

By the end of this stage, the game could include:

• a simple patrolling enemy

• a moving hazard

• collision detection between the player and enemies

• lives lost when touching danger

• moving objects stored in lists

• simple movement boundaries

• testing evidence for enemy behaviour

• improved level design using timing and risk

Not every student needs to add all of these features. It is better to add one or two well-tested features than six unfinished ones.

Start With One Enemy

The simplest enemy does not need complex artificial intelligence.

It can simply move left and right between two points.

For example, an enemy might patrol along a platform. When it reaches the left boundary, it turns right. When it reaches the right boundary, it turns left.

This is easy to understand, but still gives the player a real challenge.

A simple enemy could be represented as a rectangle:

enemy_rect = pygame.Rect(300, 540, 40, 40)
enemy_speed = 2
enemy_left_limit = 250
enemy_right_limit = 500

The enemy moves each frame:

enemy_rect.x += enemy_speed

Then the direction changes when the enemy reaches a boundary:

if enemy_rect.left <= enemy_left_limit:
    enemy_speed = 2

if enemy_rect.right >= enemy_right_limit:
    enemy_speed = -2

This creates a patrol movement.

It is not complicated, but it is enough to make the level more interesting.

Turning the Enemy Into Data

As the project grows, one enemy is not enough. The game may eventually need several enemies.

Instead of creating separate variables for every enemy, we can store enemies as data.

For example:

enemies = [
    {
        "rect": pygame.Rect(300, 540, 40, 40),
        "speed": 2,
        "left_limit": 250,
        "right_limit": 500
    },
    {
        "rect": pygame.Rect(500, 360, 40, 40),
        "speed": 1,
        "left_limit": 450,
        "right_limit": 650
    }
]

Then we can update all enemies using a loop:

for enemy in enemies:
    enemy["rect"].x += enemy["speed"]

    if enemy["rect"].left <= enemy["left_limit"]:
        enemy["speed"] = abs(enemy["speed"])

    if enemy["rect"].right >= enemy["right_limit"]:
        enemy["speed"] = -abs(enemy["speed"])

This is a very useful A Level project idea.

The student can explain that enemies are stored in a list of dictionaries so that multiple enemies can be processed using the same code.

This is much better than writing separate code for enemy one, enemy two and enemy three.

Drawing Enemies

Drawing enemies is straightforward once they are stored in a list.

For example:

for enemy in enemies:
    pygame.draw.rect(screen, (150, 0, 150), enemy["rect"])

At first, enemies can be simple purple rectangles.

Later, they could become sprites, robots, monsters, bugs, spikes or animated characters.

The important thing is not the artwork. The important thing is the behaviour.

A plain rectangle that moves correctly is better than a beautiful enemy that does not work.

Collision With Enemies

Once enemies exist, the player needs to interact with them.

The simplest rule is:

If the player touches an enemy, the player loses a life and returns to the start position.

Example code:

for enemy in enemies:
    if player_rect.colliderect(enemy["rect"]):
        lives -= 1
        player_rect.x, player_rect.y = current_level["player_start"]
        player_y_velocity = 0

If lives reach zero:

if lives <= 0:
    game_over = True

This creates a clear lose condition.

It also creates excellent testing opportunities:

• Does the enemy move?

• Does the enemy turn around at the boundary?

• Does the player lose a life after touching the enemy?

• Does the player return to the start?

• Does the game end when lives reach zero?

These are specific and testable.

Should the Player Defeat Enemies?

Some platform games allow the player to defeat enemies by jumping on them.

This is a more advanced interaction.

The game has to decide whether the player touched the enemy from the top or from the side.

If the player lands on top of the enemy, the enemy is removed.

If the player touches the enemy from the side, the player loses a life.

A simple version might check whether the player is falling and whether the bottom of the player is near the top of the enemy:

if player_rect.colliderect(enemy["rect"]):
    if player_y_velocity > 0 and player_rect.bottom <= enemy["rect"].top + 15:
        enemies.remove(enemy)
        player_y_velocity = -8
        score += 20
    else:
        lives -= 1
        player_rect.x, player_rect.y = current_level["player_start"]

This is more complex and should be treated as an extension.

It is a good example of advanced collision response.

It also creates a useful design decision:

Should the game reward attacking enemies, or should the player simply avoid them?

Either answer is acceptable if the student can justify it.

Adding Moving Hazards

A moving hazard is similar to an enemy, but it does not need to look intelligent.

It might be:

• a moving spike block

• a swinging danger zone

• a rising lava area

• a moving electric barrier

• a falling rock

• a timed laser

A simple moving hazard could move vertically instead of horizontally.

Example:

moving_hazards = [
    {
        "rect": pygame.Rect(600, 400, 40, 40),
        "speed": 2,
        "top_limit": 300,
        "bottom_limit": 520
    }
]

Updating the hazard:

for hazard in moving_hazards:
    hazard["rect"].y += hazard["speed"]

    if hazard["rect"].top <= hazard["top_limit"]:
        hazard["speed"] = abs(hazard["speed"])

    if hazard["rect"].bottom >= hazard["bottom_limit"]:
        hazard["speed"] = -abs(hazard["speed"])

This creates a moving danger area that the player must avoid.

The player now has to time the jump, not just make the jump.

That makes the level feel more alive.

Timed Hazards

Another useful interaction is a timed hazard.

For example, a laser could switch on and off every few seconds.

This introduces the idea of time-based state.

A simple timer variable might be:

hazard_timer += 1

Then:

if hazard_timer < 120:
    laser_active = True
else:
    laser_active = False

if hazard_timer > 240:
    hazard_timer = 0

At 60 frames per second, this means:

• laser active for about 2 seconds

• laser inactive for about 2 seconds

• cycle repeats

If the laser is active, it is drawn and collision is checked:

if laser_active:
    pygame.draw.rect(screen, (255, 0, 0), laser_rect)

    if player_rect.colliderect(laser_rect):
        lives -= 1
        player_rect.x, player_rect.y = current_level["player_start"]

This is a good extension feature because it introduces timing and changing states.

It also needs careful testing.

Moving Platforms

Moving platforms are especially interesting because they are both helpful and difficult.

A moving platform might carry the player across a gap.

That sounds simple, but it creates a tricky problem:

If the platform moves, should the player move with it?

If the player is standing on a platform moving right, the player should probably move right as well.

A simple moving platform could be stored like this:

moving_platforms = [
    {
        "rect": pygame.Rect(250, 420, 120, 20),
        "speed": 2,
        "left_limit": 200,
        "right_limit": 500
    }
]

Updating it:

for platform in moving_platforms:
    platform["rect"].x += platform["speed"]

    if platform["rect"].left <= platform["left_limit"]:
        platform["speed"] = abs(platform["speed"])

    if platform["rect"].right >= platform["right_limit"]:
        platform["speed"] = -abs(platform["speed"])

If the player is standing on the moving platform, we may need to move the player with it:

if player_rect.colliderect(platform["rect"]) and player_y_velocity >= 0:
    player_rect.bottom = platform["rect"].top
    player_y_velocity = 0
    on_ground = True
    player_rect.x += platform["speed"]

This is more advanced than a moving enemy because it affects the player’s position.

For some students, moving platforms may be an excellent extension. For others, they may be too much for the main project.

Again, the key is scope.

The Danger of Adding Too Much

This is the stage where many student projects can become messy.

Once enemies work, students want more.

They want:

• different enemies

• bosses

• power-ups

• moving platforms

• falling platforms

• switches

• keys

• locked doors

• weapons

• animations

• sound effects

• particle effects

• multiple routes

Some of these ideas are excellent, but too many can destroy the project.

A strong A Level project is not judged by how many features were imagined. It is judged by how well the chosen features were planned, implemented, tested and evaluated.

A sensible feature plan might be:

Essential for Part 6

• one moving enemy

• collision with enemy

• losing a life

• testing enemy behaviour

Desirable

• two enemies with different speeds

• one moving hazard

• improved level layout

Extension

• jumping on enemies to defeat them

• moving platforms

• timed hazards

• different enemy types

• simple enemy animation

This keeps the project controlled.

Making Difficulty Fair

Enemies and moving hazards should make the game more interesting, not unfair.

A fair challenge gives the player time to understand what is happening.

Good design questions include:

• Can the player see the enemy before reaching it?

• Is there enough time to react?

• Is the safe route clear?

• Does the enemy movement pattern make sense?

• Can the player learn from a mistake?

• Is the first enemy easier than later enemies?

A moving enemy placed immediately at the start of the level may feel unfair.

A moving enemy introduced after a safe first jump may feel much better.

Good games teach the player gradually.

Good projects should show that thought process.

Testing Enemies and Moving Hazards

This stage needs careful testing because moving objects create more possible outcomes.

Example test table:

Test Number	Test	Expected Result	Actual Result	Pass/Fail
1	Start the level	Enemy appears in correct position	Enemy appears correctly	Pass
2	Observe enemy movement	Enemy moves between two limits	Enemy patrols correctly	Pass
3	Enemy reaches left limit	Enemy changes direction	Enemy turns correctly	Pass
4	Enemy reaches right limit	Enemy changes direction	Enemy turns correctly	Pass
5	Player touches enemy	Player loses one life	Life decreases by one	Pass
6	Player touches enemy with one life left	Game over occurs	Game over displays	Pass
7	Player avoids enemy and reaches finish	Level can still be completed	Level complete	Pass
8	Moving hazard reaches top limit	Hazard changes direction	Hazard turns correctly	Pass
9	Player touches moving hazard	Player loses life and restarts	Player restarts correctly	Pass
10	New user plays level	User understands enemy danger	User understood after first attempt	Pass

Testing should include observation over time.

A moving enemy might work for the first few seconds but fail later if the boundary checks are wrong.

User Feedback

At this stage, user feedback becomes especially useful.

The student could ask a tester:

• Was the enemy easy to understand?

• Did the movement pattern feel fair?

• Was the level too easy or too hard?

• Did you know what to avoid?

• Did the hazard look dangerous?

• Did the game give enough feedback when you lost a life?

• What would improve the level?

Useful feedback might say:

The enemy was difficult to see because it was too similar in colour to the platform.

That could lead to a design change.

Or:

The moving hazard was too fast, and the player had no time to react.

That could lead to reducing the hazard speed.

This is exactly the type of evidence students should collect.

Recording Bugs and Fixes

Enemies and moving hazards are likely to produce bugs.

Examples include:

• enemy moves off the platform

• enemy gets stuck at the boundary

• enemy speed becomes zero

• player loses several lives instantly from one collision

• moving hazard does not reverse direction

• player respawns directly onto a hazard

• moving platform pushes the player through a wall

• enemies keep moving after game over

These are not disasters. They are opportunities.

A good development log should record:

• what the bug was

• how it was found

• what caused it

• how it was fixed

• how the fix was tested

For example:

Problem: When the player touched an enemy, several lives were lost at once because the collision was detected repeatedly over several frames.
Solution: I reset the player position immediately after the collision and added a short invulnerability period after losing a life.
Test: I deliberately collided with the enemy several times and checked that only one life was lost each time.

This is strong evidence of debugging.

Adding a Short Invulnerability Period

One common issue is that the player may lose multiple lives very quickly if they remain in contact with an enemy for several frames.

A simple solution is to add a temporary invulnerability period after damage.

Example:

invulnerable_timer = 0

Each frame:

if invulnerable_timer > 0:
    invulnerable_timer -= 1

When the player touches an enemy:

if invulnerable_timer == 0:
    lives -= 1
    invulnerable_timer = 60
    player_rect.x, player_rect.y = current_level["player_start"]

At 60 frames per second, this gives about one second before the player can be damaged again.

This is an excellent feature for stronger students because it introduces timed state management.

Making the Level Feel Alive Without Overcomplicating It

A level does not need dozens of features to feel alive.

One patrolling enemy can change how the player approaches a jump.

One moving hazard can make timing important.

One moving platform can create a new route.

The best approach is to add one feature, test it, improve it and then decide whether another feature is needed.

A controlled level might include:

• one easy enemy near the start

• one moving hazard in the middle

• one harder enemy near the finish

• collectables placed near danger for optional challenge

This creates variety without overwhelming the project.

Linking Back to Success Criteria

This stage can support success criteria such as:

• The game includes at least one moving enemy.

• The enemy changes direction at set boundaries.

• The player loses a life after touching an enemy.

• The game includes at least one moving hazard.

• The player can avoid enemies and complete the level.

• The game gives clear feedback when the player loses a life.

• User testing is used to adjust difficulty.

The student should update the success criteria if new features are added.

This is important because projects often evolve.

The final evaluation should compare the completed game with the final agreed success criteria, not just a vague original idea.

Practical Task for Students

Part 6 Student Task

Add one enemy or moving hazard to your platform game.

Your program should include:

1. One moving enemy or hazard.

2. Movement between two limits.

3. Collision detection with the player.

4. A consequence when the player touches it.

5. A way for the player to avoid it.

6. Testing of movement and collision.

7. At least one adjustment after testing.

8. Screenshots or video evidence.

9. A development log entry explaining the feature.

10. A clear link back to the success criteria.

Extension Task

Add one advanced interaction, such as:

• a second enemy with a different speed

• jumping on enemies to defeat them

• moving platforms

• timed hazards

• temporary invulnerability after damage

• enemies stored in external level data

• different enemy types

• sound effects for damage or enemy defeat

Students should only attempt extensions once the first enemy or moving hazard works reliably.

Development Log Example

A good development log entry might look like this:

Development Stage

Adding enemies and moving hazards.

Aim

To make the level more challenging by adding a moving enemy that patrols between two points and causes the player to lose a life on contact.

What Was Added

• enemy rectangle

• enemy speed

• left and right movement limits

• enemy movement loop

• collision detection with the player

• life loss after collision

• player reset after damage

Problems Found

• The enemy initially moved off the platform.

• The player sometimes lost more than one life from a single collision.

• The first enemy position made the level too difficult for a new user.

Changes Made

• Added left and right movement boundaries.

• Reset the player to the start after collision.

• Moved the enemy further into the level.

• Reduced the enemy speed after user testing.

Evidence Collected

• screenshot of the enemy position

• short video of enemy movement

• code showing enemy data

• test table for enemy collision

• user feedback about difficulty

• notes explaining changes made after testing

This gives the project a clear development trail.

Personal Reflection: This Is Where Students See the Difference Between Animation and Interaction

Students often enjoy this stage because it looks more exciting. Enemies move. Hazards travel. The player has to react.

But the most important lesson is not animation.

It is interaction.

A moving enemy is not just a picture sliding across the screen. It has rules. It has limits. It changes direction. It affects the player. It changes the difficulty of the level.

This is a powerful idea in Computer Science.

The game becomes a system of interacting objects.

The player, platforms, enemies, hazards, collectables and finish point all have relationships with each other.

That is why a simple 2D game can become such a useful programming project.

It gives students a practical way to explore logic, data, testing and design.

Final Thoughts: A Level That Feels Alive

By adding enemies, moving hazards and advanced interactions, the platform game begins to feel much more alive.

The player is no longer just travelling through a static route.

They must watch, time, avoid, decide and react.

That makes the game more engaging.

It also makes the project stronger because the student can show more advanced programming ideas: lists of enemies, movement limits, collision consequences, timers, state variables, user testing and difficulty balancing.

The key is control.

One well-designed enemy is better than five unfinished ones.
One moving hazard that works reliably is better than a whole level full of broken ideas.
One carefully tested interaction is better than a long list of features that cannot be explained.

A good A Level project is not about adding everything.

It is about choosing the right features, building them properly, testing them carefully and explaining the decisions clearly.

In the next article, we can look at menus, lives, scoring, high scores and the wider game structure that turns a playable level into a more complete game.

 

The Air Freshener That Vanishes: Observing Sublimation and Deposition

Most students learn the familiar sequence of changes of state:

solid -> liquid -> gas

Ice melts into water. Water boils or evaporates into water vapour. Cool the vapour sufficiently and it condenses back into a liquid.

However, not every substance follows that familiar route under ordinary laboratory conditions. Some solids can change directly into a gas without first becoming a visible liquid.

This process is called sublimation.

The reverse process, in which a gas changes directly into a solid, is called deposition:

solid -> gas = sublimation

gas -> solid = deposition

A coloured block of solid air freshener provides a particularly memorable demonstration because it does more than show a change of state. It also reveals how sublimation can separate one substance from another.

The coloured block gradually disappears, yet the material that collects on the cold surface above it is white.

Where has the colour gone?

That simple observation opens the door to discussions about particles, intermolecular forces, mixtures, purification and industrial chemistry.

An Important Safety Warning

This is not an experiment to attempt at home.

Heating solid air freshener considerably increases the amount of vapour released. Some solid products contain harmful substances, and suitable demonstrations must therefore be performed in a functioning fume cupboard or with another properly assessed method of containing the vapour.

The demonstration should be carried out by a trained teacher or technician using an identified product, its current safety data sheet and an appropriate institutional risk assessment. Eye protection should be worn, and the solid should be handled with suitable tools rather than directly by hand.

Gel air fresheners are not suitable because they do not behave in the same way as the solid blocks used for this demonstration. The Royal Society of Chemistry recommends this as a teacher demonstration and specifies a fume cupboard because heating can cause potentially harmful concentrations of vapour to build up.

The Basic Demonstration

The apparatus is conceptually simple.

A few small pieces of a suitable coloured solid air freshener are placed in the bottom of a glass container. The container stands in a warm water bath at a temperature above approximately 45 C.

A second glass container containing ice is securely supported above the air freshener. The cold container must not touch the solid sample, and the entire arrangement must be stable.

The warm water gently heats the solid air freshener. The ice provides a cold surface on which the vapour can deposit.

The Royal Society of Chemistry uses this arrangement specifically to show a solid changing directly into a vapour and then returning directly to the solid state on a cold surface.

What Should Students Observe?

The experiment requires patience. It is not necessarily an immediate, spectacular reaction involving flames, flashes or sudden colour changes.

Instead, students should watch for several gradual but scientifically important observations.

1. The coloured block becomes smaller

As the air freshener is warmed, material leaves its surface. The block slowly shrinks.

It may look as though it is simply “vanishing”, but matter is not being destroyed. Its particles are escaping from the solid and entering the gas phase.

2. No pool of liquid appears

This is the essential observation.

If the air freshener were melting, students would expect to see liquid collecting around the remaining solid. Instead, the solid becomes smaller without producing an obvious liquid phase.

The change is:

solid -> gas

not:

solid -> liquid -> gas

3. A solid deposit appears on the cold surface

The vapour rises through the container and reaches the ice-cooled glass above it.

The colder surface removes energy from the vapour particles. They can no longer remain in the gas phase and form a solid deposit.

The change is:

gas -> solid

This is deposition.

4. The new deposit is white

This is often the most surprising part of the entire demonstration.

The original air freshener may be blue, green, pink or another strong colour, yet the solid deposited on the cold glass is usually white.

The coloured dye has not travelled with the main subliming substance. It remains behind because it is a separate component of the mixture and is not sufficiently volatile under the conditions used.

The experiment therefore demonstrates both a change of state and a simple method of separation.

Why Does the Solid Sublime?

The particles in a solid are not completely motionless. They vibrate around relatively fixed positions.

When the solid is warmed, its particles gain energy. Some particles at the surface eventually have sufficient energy to overcome the attractive forces holding them within the solid.

They escape directly into the gas phase.

The energy change can be represented simply as:

solid + energy -> gas

Sublimation is therefore an endothermic process because the substance absorbs energy from its surroundings.

The water bath is important because it supplies heat gently and evenly. It avoids the intense local heating that could occur if the glass container were placed directly over a flame.

Increasing the temperature also increases the rate at which particles escape from the solid. This is why a warmed block disappears more rapidly than a block left at room temperature.

The RSC suggests that, where safely possible within the fume cupboard, a separate sample can be left at room temperature so that students can compare the rates of sublimation.

Why Does Deposition Occur Beneath the Ice?

After leaving the warm solid, the vapour particles move through the space inside the apparatus.

When they strike the cold glass, energy is transferred from the particles to the cooler surface and its surroundings. As their kinetic energy decreases, attractive forces can hold them together again.

A new solid forms directly from the gas:

gas -> solid + energy transferred to surroundings

The ice-filled container is sometimes described as a simple cold finger. In more advanced laboratory equipment, a cold finger is a cooled surface designed to collect vapour as a solid or liquid.

The position of the deposit matters. Students should notice that most of the solid forms on or close to the coldest region rather than being distributed evenly throughout the apparatus.

This provides evidence that temperature influences where deposition takes place.

Where Has the Colour Gone?

The colour has not been destroyed.

A coloured air freshener block is a mixture. It contains the substance responsible for the main solid block together with relatively small amounts of dyes, fragrances and possibly other ingredients.

The dye gives the original block its appearance, but it is not necessarily chemically bonded to the substance that sublimes.

When the block is warmed:

• the more volatile solid enters the gas phase;

• the less volatile dye remains behind;

• the vapour reaches the cold surface;

• the purified substance deposits as a white solid.

The experiment is therefore similar in principle to separating a solvent from a dissolved solid by distillation. The difference is that this separation involves a direct solid-to-gas change rather than boiling a liquid.

The white deposit is powerful evidence that the colour was produced by a separate component of the mixture.

A Physical Change, Not a Chemical Reaction

Students sometimes assume that heating automatically means that a chemical reaction has occurred.

That is not necessarily true.

In this demonstration, the substance that leaves the original block forms the same substance again on the cold surface. Its state and physical location have changed, but its chemical identity has not intentionally been changed.

This is a physical change:

solid substance -> gaseous substance -> solid substance

There is no requirement for new chemical bonds to form between different elements, and no new compound needs to be produced.

The apparent disappearance of the block should not be confused with burning. Nothing is being deliberately combusted, and no flame should be involved.

The Experiment as a Purification Technique

This demonstration is more than an unusual example of the particle model. It also shows how chemists can purify substances.

Suppose a solid contains:

• a substance that sublimes readily;

• a second substance that does not sublime at the same temperature.

Heating the mixture allows the first substance to enter the gas phase. The non-subliming impurity remains in the original container.

The vapour can then be collected on a cold surface as a cleaner solid.

In simplified form:

impure coloured solid -> vapour + coloured residue

vapour -> purified white solid

The Open University’s practical material similarly describes coloured air freshener producing a white crystalline collection because the dye does not sublime with the main substance.

This is a useful bridge between school-level changes of state and more advanced ideas about separation and purification.

What Is Actually in the Air Freshener?

The composition of commercial products varies, which is one reason teachers must identify the product and check its safety information before using it.

Some solid products historically used for this demonstration contain 1,4-dichlorobenzene, also known as para-dichlorobenzene. Its formula, 

C₆H₄Cl₂

However, it would be unsafe to assume that every solid air freshener contains the same substance. Product formulations can differ, and suitability must be established from the label and safety data rather than appearance alone.

The RSC identifies some products containing 1,4-dichlorobenzene as suitable while also classifying the material as harmful and dangerous to the environment, requiring handling in a fume cupboard.

Questions to Ask During the Demonstration

A strong practical lesson should do more than show students something unusual. It should encourage them to explain what they are seeing.

Useful questions include:

Before heating

• What do you predict will happen to the block?

• Will it melt, burn, dissolve or disappear?

• Where might any escaping material go?

• Why has ice been placed above the sample?

During the demonstration

• Is there any evidence that a liquid has formed?

• Where does the first visible deposit appear?

• Why is the deposit forming on the cold surface?

• What is happening to the particles in the warm solid?

• Why is the original block becoming smaller?

After the demonstration

• Why is the collected solid white?

• What evidence suggests that the original block was a mixture?

• Is this a physical change or a chemical change?

• How could the demonstration be used as a purification method?

• What variables could affect the rate of sublimation?

Turning the Observation into an Investigation

Because of the hazards involved, students should not independently alter the apparatus or repeat the procedure themselves. However, they can still analyse teacher-collected data or observations.

Possible variables for discussion include:

Temperature of the water bath

A warmer bath would generally increase the rate of sublimation because more particles would have enough energy to escape from the solid.

Surface area of the air freshener

Small pieces have a greater total surface area than one large block of the same mass. More particles are exposed at the surface, potentially increasing the rate of sublimation.

Distance to the cold surface

Changing the distance could affect how much vapour reaches the cooled region and where the solid is deposited.

Temperature of the collecting surface

A colder surface may collect vapour more effectively because particles lose energy more rapidly when they collide with it.

Time

Students could examine how the amount of deposited material changes over a fixed period.

These extensions allow the demonstration to support discussions about variables, fair testing, evidence and experimental design without encouraging unsafe unsupervised work.

Common Misconceptions

“The solid has evaporated”

Evaporation normally describes particles escaping from the surface of a liquid. The starting material here is a solid, so the appropriate term is sublimation.

“The white material is frozen air freshener”

The phrase is misleading because the substance has not necessarily passed through a liquid state and frozen. It has deposited directly from vapour to solid.

“The ice has turned the vapour white”

The cold surface has not bleached the dye. The main subliming substance and the dye have been separated because they have different volatilities.

“The missing colour has been chemically destroyed”

The dye largely remains with the original material. Its failure to appear in the deposit is evidence of separation, not necessarily decomposition.

“No liquid means nothing has happened”

A gas can be difficult to see. The solid deposit above the sample provides evidence that material travelled through the apparatus even though the vapour itself may not have been visible.

Wider Examples of Sublimation

Sublimation is not limited to laboratory air fresheners.

Dry ice

Solid carbon dioxide changes directly into carbon dioxide gas at normal atmospheric pressure. It does not form a pool of liquid carbon dioxide under ordinary classroom conditions.

Snow and ice

Snow can gradually disappear on a cold, dry day even when the temperature remains below its melting point. Some water molecules escape directly from the ice into the atmosphere.

Freeze-drying

Food and biological materials can be frozen and placed under reduced pressure. Water is removed by sublimation, helping preserve the material without conventional heating.

Purification of solids

Chemists can use controlled sublimation to separate a volatile solid from less volatile impurities.

Vapour deposition in industry

Related deposition processes are used to create thin coatings and specialised materials in electronics, optics and manufacturing. The classroom apparatus is extremely simple, but the underlying principle has significant industrial importance.

Why This Demonstration Is So Memorable

I particularly value experiments in which a small visual detail forces students to rethink what they thought they understood.

At first, the shrinking block is interesting. The absence of a liquid is puzzling. The appearance of a solid above the sample provides an explanation.

Then students notice the colour.

That white deposit turns a straightforward change-of-state demonstration into something much richer. It shows that the original block was a mixture and that physical properties can be used to separate its components.

It also reminds us why practical science matters.

A diagram can show an arrow from solid to gas. A textbook can define sublimation in one sentence. Neither has quite the same impact as watching a brightly coloured solid slowly disappear and reappear somewhere else as a white crystalline deposit.

The experiment gives the particles a story:

• they gain energy;

• they escape from the solid;

• they move through the apparatus;

• they lose energy at the cold surface;

• they assemble into a new solid;

• they leave the dye behind.

Conclusion: Matter Has Not Vanished

The sublimation of solid air freshener is an excellent example of how a modest-looking demonstration can reveal several important scientific ideas at once.

It shows that:

• some solids change directly into gases;

• gases can change directly back into solids;

• heating increases particle energy;

• cooling encourages deposition;

• commercial products may be mixtures;

• substances can be separated because they have different physical properties;

• sublimation can be used as a method of purification.

Most importantly, it challenges the idea that every solid must melt before becoming a gas.

The air freshener has not vanished. Its particles have moved, changed state and collected in a different place.

And the missing colour provides the final clue: sometimes the most interesting result is not simply where a substance goes, but what it leaves behind.

How do I a Feel about Air Fresheners.

After doing this experiment in the lab -I don't use air fresheners at home - I wonder why?