Super science!

On Wednesday we did some more science experiments. We are learning to make predictions about what we think might happen and then compare what we thought with what really happened.

We looked at mixing materials. First we mixed blue food colouring and water. We predicted what might happen. Some of us thought the water would change colour to blue. Others of us thought it might bubble or fizz.When we mixed together the water and food colouring it did change colour - to blue! It was really funny to see it mix together because it starting swirling and wobbling round the cup until it all mixed in..

Look at it swirl!

Then we decided to mix our blue water with cooking oil. We predicted what might happen:

• It might start to fizz - Cohen
• It might look bubbly - Celestine
• It might try to come out of the bottle - Misha, Piper
• It might turn yellow like the oil - Alexander
• It might turn green because when you mix blue and yellow you get green - Mia, Lucy

This is what happened when we first poured the oil into the blue water.
We could see lots of bubbles at the top. 

This is the water and oil after we shook the bottle up to mix them together.
It went foamy and bubbly on the top but the oil wouldn't mix into the water. It just sat on top!

So what did we learn? Not all materials will mix together. And why? Liquids will always arrange themselves according to weight. Heavier, thicker liquids sink to the bottom and lighter liquids float. The oil is lighter than the water so when you try to mix them together the oil sits on top!