Investigating Friction

Trying out different frictional surfaces and different objects to see how different shapes and surfaces work. The students were surprised at the results which were not as obvious as they thought.

Carpet had a higher frictional co-efficient  than the glass-paper and in took quite of investigating to find out why.

 

Setting up a microscope

 Setting up and using a compound microscope. Although the students have used them many times, they forget how to focus away from the slide and struggle to set up the lighting properly 

Calculating the acceleration due to Gravity

 Calculating the acceleration due to Gravity online using the @Pascoscientific picket Fence and and the light gate in its stand. After 20 repeats we managed an average of 9.765, which I felt was quite good for doing this online - live in front of an audience telling me what to do.

Young-Laplace Law

Hookean showed a nice demo of differential pressure that I hadn't tried before. When I tried to reproduce it I got very different results in the experiment and had to look into the history books of what was going on

 

Photosynthesis

 With the high temperatures and lots of sunlight, it seemed a good idea to look at photosynthesis. With the plants working well we got excellent results

Staining Cells

 Trying to see cells is difficult, so often we use stains to make parts of the cell stand out. Straining is not easy, you have to choose the right stain or stains and the preparation is important, so practice is important and an important part of learning.

55.4 C Pavement temp

 Looking at the temperature of the pavement outside the classroom, a Modest 55.4C at 11am today. Talking a dog for a walk will probably burn its feet.