Polarisation Angles

 Using the @Pascoscientific light sensor and rotation sensor to measure the light transmission compared to the polaroid disk's rotation angle. We could clearly see the sine wave produced as the disk went from complete transmission to virtually none and back.

Calculator memory

 Getting used to the new news of doing things on the new Casio calculator as more students use these.

Superimposition of waves

 Using a wave tank and slo-mo to try to capture the superimposition of waves. This has been the best way I have found so far to show that the waves increase as they pass through one another. But if you know a better way ...

Photosynthesis

Having brought some pond weed in from the pond for a few days and given it some light, the plants performed well, giving off a stream of oxygen bubbles that could be counted and the oxygen tested for. We tried different light sources and different wavelengths using led bulbs.

 

Networking

 

Networking. Dusting off some 25-year-old PowerPoint. The Network slides have stayed the same in that time.

Measuring the River Flow

Measuring the river flow rate in  The River Gade. This involved a little wading. The water was at 8.9C Now to build up a cross-sectional flow map of the River to explain the distribution of organisms.

 

Iodine in water and cyclohexane

 

First, Iodine was dissolved in water and a little dissolved, changing the colour, but much of the iodine remained solid. Then it was shaken with cyclohexane, and immediately, the water layer went clear as the iodine dissolved in the cyclohexane. After a while, more iodine dissolved in the water, turning it brown again.