1. Unit 4: Thinking Like a Scientist
Theme 8: Does It Sink or Float?

2. sink- when something goes to the bottom when it is in water
If you drop a rock in water, it will sink.

3. heavy- something that weighs a lot
An anchor is heavy, but a feather is not.

4. collect- to gather things together
You can collect shells on the beach.

5. predict- to use facts and ideas to guess what will happen
Do you predict a leaf will float or sink?

6. study- to read or look at something in order to learn new information
You could study bugs that float on water to find out more about them.

7. Good swimmers know how to float on water.
float- something that stays on top of the water when it is in the water
Good swimmers know how to float on water.