2. You can tell that an object has moved when its __________ has changed. position

3. frame of reference The object used for comparing another object to describe its position is called a…

4. The distance an object moves in a certain amount of time is called _________. speed

5. A ______ graph can be used to show the change in an object’s speed over time. line

6. What makes objects change speed or direction?

7. What unit is used to measure forces? YUM!! Not that kind!!

8. What is a force between surfaces that slows or stops objects?

9. Friction creates ______. heat

10. When an object is in motion it tends to stay...

11. When an object is still it tends to remain...

12. This is called…

13. The use of a force to move an object is ________. work

14. The ability to do work is called _________. energy

15. The energy of motion is __________ energy. kinetic

16. The energy of position is _____________ energy. potential

17. Name the frame of reference in each of the following statements.

18. The dog is beside the house.

19. The duck is swimming in the pond.

20. Name the type of energy in each of the following statements.

21. The ball is rolling down the hill.

22. The roller coaster is sitting at the top of the track.

23. The pencil fell off the edge of the desk.

24. The skier is at the top of the ski jump.

25. Source: http://salem.k12.va.us/staff/jcox/powerpoints/science.htmhttp://salem.k12.va.us/staff/jcox/powerpoints/science.htm