1. 8th Grade Review SLO

2. How is a sea arch formed?

3. Mechanical weathering from waves.

4. What does it mean when the lines on a contour map are far apart?

5. It is a gradual slope

6. What does it mean when the lines of a contour map are close together?

7. Steep slope
Steep slope

8. When magma hardens to create a string of volcanoes, what kind of process is this?
Constructive or destructive?

9. CONSTRUCTIVE

10. What impact would friction have on a kid going down a slide?

11. It would slow the child down

12. Is there movement with an unbalanced force?

13. Yes movement = unbalanced force

14. What is the net force of 1000 left and 3000 right?

15. 2000 right

16. What is the net force of 2000 right and 2000 left?

17. O N- Balanced-no movement

18. How does distance affect field strength?

19. There is more force when the objects are closer…a decrease in distance is an increase in force.

20. What happens when an object enters a gravitational field?

21. The object is affected

22. What would cause a compass to move as it gets closer to the electromagnetic field?

23. Magnetism is created by an electric current

24. Vinegar and baking soda mix to release what kind of energy?

25. Thermal energy

26. Where is gravitational potential energy the greatest on a roller coaster?

27. The top of the first hill

28. When is elastic potential energy the greatest with a rubber band?

29. When it is stretched the furthest

30. Where does indirect evidence about the layers of the earth mostly come from?

31. Seismic waves(from earthquakes)

32. What is the inner core of the earth made of(state of matter and material)?

33. Iron rich solid

34. As you go deeper into the Earth, describe the density of the layers.

35. The deeper you go into the Earth the more dense the layers are

36. When two identical fossils are found on different continents, what can you conclude?

37. The continents were once joined

38. If you see layers with fossils like this:
Fish_____
Shell_____
Oak leaf__
Fern_____
What was replaced by the sea?

39. The forest was replaced by the sea

40. What causes the tectonic plates to move?

41. Convection currents

42. How do convection currents move? What direction?

44. What/where is the energy source for tectonic plate movement?

45. Heat from the inner core

46. What is the cause of tectonic plate movement?

47. Convection currents in the asthenosphere

48. Where are volcanoes most likely to form?

49. Near the edges of the tectonic plates

50. When you see a tectonic plate diagram with arrows moving in opposite direction past each other.
 What is the name of this boundary?
 What could this movement cause?

51. Transform boundary Earthquake

52. Describe this boundary
 

53. Convergent

54.  

55. Divergent

56. What layer do the tectonic plates float on?

57. The asthenosphere

58. The law of superposition states that the oldest rock is where?

59. On the bottom

60. If you say an Earth layer is older or younger, you are determining____________ age.

61. Relative

62. If an intrusive rock cuts through all the layers, what can you conclude about it’s relative age?

63. It is the youngest, it had to come last

64. In an experiment, what is the one thing you change?

65. Independent variable

66. In an experiment, what is measured or changes as a result of changing the independent variable?

67. The dependent variable

68. Name the physical layers of the Earth from least dense to most dense.

69. Lithosphere
Asthenosphere
Mesosphere
Outer core
Inner core

70. What is the difference between weight and mass? (4 points)

71. Weight is a measure of gravity
Weight can change from place to place
Mass is a measure of matter
Mass doesn’t change unless you add or subtract from it.