What a week!
Chestnut’s have had a fabulous time conducting many experiments as part of Science week, which has been focused on ‘changes’.
On Monday, we investigated how a balloon changes when it is exposed to heat, one had just air inside it and the other contained some water as well as air. We made predictions of what would happen. ‘I think the balloon with no water will burst first because it is lighter’ and ‘I think the one with no water will burst first because water takes away the fire’.
We found that the balloon with air burst after 47 seconds and the balloon with water burst with two candles burst after 59 seconds, which resulted in Miss Free getting wet. We discussed how the reason it was slower to burst the water is because the water acted like a sponge absorbing the heat from the fire which meant the balloon didn’t get to hot too quickly.
On day two, we investigated the effect that washing up liquid has on water and milk. We used two plates with a small amount of milk and water on each with a few drops of food colouring. We watched how the liquids reacted when we put in some washing up liquid. The plates with milk resulted in making pretty patterns and colours like the rainbow whilst the water stayed the same and didn’t react. We found that the fat molecules in the milk and the molecules in the washing up liquid are so strong on the surface it pushes the food colouring away!
Day 3, and Team Chestnuts were in for a very exciting day of experiments, we were joined by Willow class from Hennock and a lady from The Environmental Food Waste Management Incinerator in Plymouth where all of the rubbish from Teignbridge goes instead of going to landfill and a special fact… Teignbridge is the only district in Devon to be zero landfill so well done everyone!
The incinerator is much more environmentally friendly than landfill because it produces no methane gas as well as taking up far less space. Not only that but, it uses it’s energy for other businesses around Plymouth. Unfortunately, it does still produce Carbon Dioxide, however it is still a massive improvement to landfill sites. Another side effect of the incinerator is a by product called ‘bad ash’ which after the burning has occurred is encapsulated in a pod to prevent it from entering natural water ways after it’s buried under ground and whilst it is far less than 200,000 tonnes as a child from Willow said ‘7000 tonnes is still quite a lot!’.
We found out how the process works, 200,000 tonnes of rubbish is delivered to the incinerator each week and the steam that the incinerator produces powers a turbine powering Plymouth Dockyards next door through cables under ground, which is equivalent to having enough power to provide electricity for 37,000 homes! The incinerator walls are also filled with water which is then sent to nearby businesses to provide heating.
Not only that but, a substance called top ash is used as asphalt for roads and pavements!
After Break Team Chestnuts and Willow Class got hands on with different experiments making volcanoes and watching how change happens to water when we put vinegar and bicarbonate of soda together. It was proper explosive.
Check out these videos by clicking on the links!
The children got to explore a very odd substance that was a little confused between whether it was a solid or a liquid, if you squeezed it or hit it it was solid but, if you let it go it would run through your fingers like runny cream… peculiar!?
We also investigated how milk and washing up liquid behaves in different concentrations comparing full fat milk, semi skimmed and skimmed.
Finally, we produced our own ‘reduce, reuse, recycle posters on how to look after the environment.
The children have had an absolutely fabulous week and the behaviour was exemplary from both classes!
Miss Free will be uploading a video of all the different experiments we have been doing and putting it on the website over the weekend so keep your eyes peeled!