Amy is in her favourite lesson. Science!
She makes a prediction, "Plants need light to grow".
A prediction means to guess what is going to happen.
Milo says that Amy is wrong. He thinks that plants can grow with no light.
The class aim is to find out who is right and who is wrong.
The aim is the thing you want to do or achieve.
Can you help them?
We will also find out how to make the test fair.