1. Force and Motion

2. When you write a letter, what holds the desk and you to the floor?

3. Gravity

4. ____________ between your fingers and the pen keeps the pen upright.

5. friction

6. You can probably pick up an apple exerting just one __________ of force.

7. A Newton

8. Riding down a hill on your bicycle, slowing down, and turning are all examples of_________?

9. acceleration

10. When you watch a football game from a seat near the top of the stadium, your position and all the things around you are part of your ___________?

11. Frame of reference

12. Motion is stopped and started by ________?

13. force

14. ____________ is a measure of the force of gravity and varies from planet to planet.

15. Weight

16. To find a runner’s _________, you need to know the distance he or she ran and the time it took.

17. Speed

18. How do you know if a runner is in motion? He keeps changing his ______________

19. Position