December 7-11

**Vocabulary Test on Wednesday December 16**

Unit F- Chapter 1

1. force- a push or a pull

2. push- a pressing force

3. pull- a tugging force

4. zigzag- sharp turns back and forth

5. motion- moving from one place to another

6. surface- the top or outside of something

7. friction- a force that makes it harder to move things

8. wheel- a roller on and axle