1. Energy
Contact
Forces
Forces
Levers
Vocabulary
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2. Can energy be created or destroyed?

3. What is energy can be created or destroyed.

4. Energy that is released during a chemical reaction is called this.

5. What is chemical energy

6. The energy an object has because it is in a position where it is affected by a force is called what?

7. What is potential energy?

8. This type of energy affects how fast or slow an object moves.

9. What is kinetic energy?

10. The power in a neighborhood has gone out
The power in a neighborhood has gone out. Families gather around candles in their houses to keep warm. What type of energy is keeping them warm?

11. What is heat energy?

12. This is the force that causes a moving object to slow down.

13. What is friction?

14. What is the natural force that causes objects to move towards the center of the earth as a result of gravitational pull?

15. What is the gravity?

16. What is an invisible force that attracts some metals, especially iron and steel?

17. What is magnetism?

18. When a marble hits a stationary marble, what happens to the marble that was hit?

19. What is the second marble moves until friction causes it to stop.

20. Do all items fall at the same rate?

21. What is no, because of air resistance?

22. When you arm wrestling results in a tie, what type of force does this represent?

23. What is a balanced force?

24. When I win in arm wrestling I have created what?

25. What is an unbalanced force?

26. When a book is lying on a desk, what forces are acting on it?

27. What is gravity?

28. How can you tell if unbalanced forces are acting on an object?

29. What is if the object is in motion?

30. What type of force causes a change in speed, direction or motion?

31. What is unbalanced force?

32. Below is a picture of a human arm. Label the load, effort and fulcrum.

33. What is fulcrum, effort, load?

34. What class of lever system is a tweezers?

35. What is class 3 lever?

36. What is a class 2 lever system?

37. What is fulcrum, load, effort?

38. What happens when the effort is closer to the fulcrum?

39. What is the closer the effort is to the fulcrum the harder it will be to lift the load?

40. What is one way that a lever can provide an advantage to the user?

41. What is it makes the load easier to lift?

42. What is a lever?

43. What is a simple machine that people use to gain a mechanical advantage?

44. What is a lever arm?

45. What is a stick or beam free to pivot at a point?

46. What is a fulcrum?

47. What is the point where the lever arm pivots?

48. What is the difference between the load and the effort?

49. What is the load is what the mass being lifted and the effort is the amount of force needed to move the load?

50. What is a newton?

51. What is the unit used to measure force?