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Recently we have been studying mixtures in science and looking at why some things dissolve in water and why others won’t. To further solidify what we had learnt we did an experiment. To begin with you will need the following things:
• Some clear jars/bottles or tubes
What you need to do:
1. Draw up a table with all of the substances across the top and down the side like this:
2. First discuss with the child what they think will happen when you mix some of these substances and if they can explain why.
3. Add the liquids together as indicated in the table and have the child observe and record in the table whether they mixed or not.
When two things combine together so that you can no longer tell them apart we say they have mixed. For example you would have seen that milk is white and juice (we used orange) is orange, but when we combined them we got a new cloudy colour. Juice and milk mix because they are the same type of liquid. On the other hand when oil and water were combined you should have seen the oil was separate from the water and no matter how much you shook you would get droplets of oil forming at the top and the water collecting at the bottom. Oil and water do not mix because they are different types of liquids.
The golden rule is: LIKE DISSOLVES LIKE