Measuring the Speed of Sound

 Measuring the speed of Sound using a tuning fork and a tube, pulling out the slider until the loudest sound can be heard and measuring the distance from the tuning fork. This gives the wavelength. Repeat this several times to get a good average, and then work out how much of a wavelength the distance is calculated at the velocity of sound in air at this temperature.

Site of Respiration

 The Mitochondrion is the site of respiration. Is this an ancient bacterium that invaded another in an example of symbiosis that created a new type of organism? DNA Evidence? Mitochondria self-replicate.

Calculating Depreciation

 ​In Business, depreciation refers to the gradual decrease in value of an asset over time due to factors like wear and tear or obsolescence, and it's a key accounting concept used to allocate the cost of an asset over its useful life. 

How a hard disk works

 Taking a hard disk to bits so that the students could see how a hard disk works.

Displacement reactions

Using displacement reactions, comparing the reactivities of three different metals with their sulfates—Copper, Iron, and Zinc—to find out which is the most reactive and which is the least.

Gay Lussac's Law

 Constant volume: Increasing the Temperature increases the pressure—Gay Lussac's Law. It is so much easier and more accurate to use a @pascoscientific wireless pressure sensor than a Bordon Gauge.

Cards and Probability

Many questions in Maths Papers look at the probability of selecting a card but many students don't play cards except perhaps on a computer games and don't know the names, values or suits.