Plate Tectonics

6. a supercontinent that formed when Pangea broke in the Triassic time period; other is Laurasia
8. the first layer of the earth that is 5-100 km thick and made of silicon and oxygen
9. a time period (65 million years ago), when Gondwanaland broke up into South America and Africa
11. a supercontinent that formed when Pangea broke in the Triassic time period; other is Gondwanaland
12. the second layer of the earth that is 2900 km thick and made out of iron, nickel, and magnesium
13. a time period (200 million years ago), when Pangea split up into two supercontinents: Laurasia & Gondwanaland
14. a crust type that is a little dense, 30-50 km thick, and mostly made of granite
15. a time period (225 million years ago), when the supercontinent Pangea existed
17. a time period (150 million years ago), that was also called The Age of the Dinosaurs
18. the man who came up with the plate tectonics hypothesis
19. a plate boundary that happens when plates collide, forming mountains and coastline volcanoes
20. a plate boundary that happens when plates slide past each other, creating earthquakes and faults

1. a crust type that is really dense, 5-10 km thick, and mostly made of basalt
2. a supercontinent that existed 225 million years ago, when all the continents were together
3. a rocky steep hill that is created when convergent boundaries occur
4. the center of the earth that is 1200 km thick and made out of iron and nickel; it is hotter than the surface of the sun
5. a crack in the plates that happen when a transform boundary occurs
7. a meteorologist who came up with the hypothesis of continental drift
10. the third layer of the earth that is 2300 km thick and made of iron and nickel
12. an animal whose fossils were found on two continents separated by an ocean; it helped Alfred Wegener with his continental drift theory
16. a plate boundary that happens when plates move apart, creating mid-ocean ridges and rift valleys