Review Unit 1B

1. Review Unit 1B Inside the Earth

2. #44. A Convergent Boundary is a boundary is where two tectonic plates come together, or collide. This can form mountains, and trenches.

3. #45. A Divergent Boundary is where two tectonic plates pull away or separate. This can create new ocean floor and cause magma to rise to surface.

4. #46. A Transform Boundary is where two tectonic places slide past each other. These type of boundaries are where most earthquakes occur.

5. #47. Why would a large, nonvolcanic mountain on a flat plain be very unusual on the Earth’s surface? Volcano and mountains form at convergent plate boundaries. Areas near these plate boundaries are never smooth.

6. #48. List the six layers of the Earth. Inner Core Outer Core Mantle Asthenosphere Lithosphere Crust (oceanic and continental)

7. #49. A deep well or mine shaft goes through which layer or layers of Earth? Crust only

8. #50. When magma reaches Earth's surface it becomes lava.

9. #51 Earth’s crust • Section V is solid iron – intense pressure • Section IV is molten iron • Section III and II are magma (liquid) – convection currents • Section I is solid

10. #52. Compared to rocks in Earth's crust, rocks in the mantle are more dense.

11. #53. Areas on Earth's surface that lie above the places where tectonic plates meet are characterized by frequent earthquake activity.

12. #54. Most earthquakes and volcanoes occur in areas of the Pacific Ocean called "The Ring of Fire.” The main reason is that Lithosphere plate boundaries are found in that area

13. #55. A tsunami is a common secondary effect of a large earthquake off the coast.

14. #56. Uniformitarianism states that in an undisturbed layer of rock, older rocks lie at the bottom and younger rocks lie at the top.

16. #57. Since there are no rock layers that have fossils of both dinosaur and horse remains scientists know that dinosaurs and horses did not exist in the same geological eras.

17. #58. What is the MAIN reason that the continents look very different than they did 100 million years ago? The continents have drifted apart from one another on lithospheric plates.

18. #59. Fossils of a particular animal species have been found in both southern Africa and South America but nowhere else. The MOST LIKELY reason? In the past, Africa and South America were part of the same continent.

19. #60. A fossil of an ocean fish was found in a rock outcrop on a mountain. This probably means that the mountain was raised up after the fish died.