2. Jeopardy A?B?C?D?E? $100 $200 $300 $400 $500

3. ANSWER This is what you use when a friend serves you a volleyball and you hit it back.

4. QUESTION What is: A force to make the ball change directions.

5. ANSWER TRUE OR FALSE: A force causes an object to move, stop moving, and chance its direction of movement.

6. QUESTION What is: TRUE, TRUE, TRUE! A force will make an object move, stop moving, and change its direction of movement.

7. ANSWER This is the force that pulls any two objects toward each other.

8. QUESTION What is: GRAVITY

9. ANSWER This is what you do to tell that on object is moving.

10. QUESTION What is: compare it to other objects.

11. ANSWER TRUE or FALSE: Astronauts weigh less on the moon than on Earth because the moon has less gravity than Earth.

12. QUESTION What is: TRUE - the moon has less gravity than Earth.

13. ANSWER This is the force that slows down moving objects.

14. QUESTION What is: FRICTION

15. ANSWER TRUE OR FALSE: Gravel is the best surface to use when you want to have a rollerskate race.

16. QUESTION What is: FALSE, FALSE, FALSE. The best surface to have a rollerskate race on is blacktop.

17. ANSWER This is the energy an object has because it is in motion.

18. QUESTION What is: Kinetic Energy

19. ANSWER A child sitting at the top of the slide has this kind of energy.

20. QUESTION What is: Potential Energy

21. ANSWER TRUE or FALSE: A battery-powered car uses chemical energy.

22. QUESTION What is: TRUE, TRUE, TRUE!!

23. ANSWER This is the type of energy that a person uses when pedaling a bicycle.

24. QUESTION What is: Mechanical Energy

25. ANSWER These are the forms of energy that are produced when a candle is burned.

26. QUESTION What is: heat and light energy.

27. ANSWER A student rubs a stick across the teeth of a comb. The mechanical energy is being changed into this form of energy.

28. QUESTION What is: sound energy

29. ANSWER TRUE OR FALSE: When a battery is used to light a bulb, chemical energy is changed into electrical energy.

30. QUESTION What is: TRUE, TRUE, TRUE!!

31. ANSWER This is the form of energy that is stored by the batteries inside a flashlight.

32. QUESTION What is: Chemical Energy

33. ANSWER TRUE or FALSE: Having red paint on a wagon help to best reduce the force needed to move the wagon.

34. QUESTION What is: FALSE, having wheels on a wagon will best reduce the amount of force needed to move a wagon, not the color of the wagon.

35. ANSWER There are three balls with different weights and are rolled down an incline one at a time. They each strike a wooden block at the bottom of the inclined plane. The ball with the ________ weight will move the block the greatest distance.

36. QUESTION What is: greatest. The ball with the greatest weight will move the wooden block the farthest from the inclined plane.

37. ANSWER When sandpaper is rubbed over wood, both surfaces become warm. This is a result of

38. QUESTION What is: FRICTION

39. ANSWER TRUE or FALSE: If there were no air friction, a thrown ball will still fall to the ground.

40. QUESTION What is: TRUE. Even without friction, gravity is still acting on the thrown ball.

41. ANSWER TRUE OR FALSE: You are doing work when you watch TV.

42. QUESTION What is: FALSE, but you are doing work when you carry laundry downstairs.

43. ANSWER This is why it will take more force to push a sled over a rocky road then over ice.

44. QUESTION What is: Because of FRICTION

45. ANSWER This is why it will take more force to pull two friend in a sled than an empty sled.

46. QUESTION What is: because there is an increase in mass in the sled (weight of friends).

47. ANSWER These are the two forces that act on a thrown ball to make it slow down and make it fall to Earth.

48. QUESTION What is: GRAVITY and FRICTION

49. ANSWER This is what happens to the potential and kinetic energy of a leaf as it falls from a branch to the ground.

50. QUESTION What is: The potential energy decreases and the kinetic energy increases.

51. ANSWER TRUE or FALSE: Two children are lifting boxes that differ in weight. The child that does more work is the one that lifts the box with the greatest weight.

52. What is: TRUE