Who can swimm faster ?

Aim:
To find out who can swim faster, boys or girls. 



Hypothesis:
I think the boys can swimm faster then the girls.

Method :
Step1. Go to the swimming pool. Step2. The boys and the girls get ready to swimm. Step3. They start. Step4. The team who came back first win, and that means that they can swimm faster.

Variables:
boys and girls

What i need :
-3 boys (minimum), -3 girls (minimum), a sunny day , a swimming pool.