1. 6 bottles (these need to be all the same if it is to be a fair test. We ended up using Grolsch -bottles as I couldn't find any others that were all the same. Its a good job Christmas has just been otherwise I think we would have struggled to find enough bottles).
2. Dried yeast - enough for half a teaspoon per bottle
3. Warm water
4. 6 balloons
5. Measuring jug
6. Various sugary liquids (we used apple juice, orange juice, treacle, mashed banana, lemonade).
1. Fill each bottle a quarter full with warm water
2. Add half a teaspoon of yeast to each bottle
3. Fill the first bottle half way full with one of the sugary liquids
4. Fill the second, third, fourth and fifth bottles with different sugary liquids. Make sure you add the same amount of liquid to each bottle.
5. Fill the sixth bottle half way full with water. This is the control.
6. Put a balloon over the opening of each bottle. The ballon that inflates the most will show which liquid produces the most carbon dioxide.
We decided to check our balloons at 30 minute intervals. Initially the banana mixture produced the most carbon dioxide, followed by the treacle, apple, lemonade, orange and water respectively. After several hours the treacle solution had produced the most carbon dioxide followed by the orange, mashed banana, apple, lemonade and water.
Next bread making day I think we will look at why gluten is important.
On a trip into the village to buy balloons for our experiment Thea spotted Issue 1 of The Art of Knitting, special offer 99p. If you want to learn how to knit its a good buy, with Issue 1 you get a set of 4.5mm needles, two balls of yarn, and a DVD showing you how to knit. The DVD is very straightforward and easy to follow. Even if you don't buy any other issues this one is worth getting. Thea has taught herself to cast on from the DVD.
This afternoon I spent time with James going through his Toe By Toe work book and Letts Maths Basics. His reading is definately improving but his fluency is still not what it should be. However, the main thing is he is happy and he now sees that he can read.