about earth

2. first layer 20 miles thick
4. measure intensity of earthquake based on eye witness accounts
6. large wave caused by earthquake underwater
7. when rocks form at the bottom of the ocean the magnetic minerals line up with magnetic north not all the rock was formed at the same time this is what shows
11. sections that crust is broken into
14. last layer 780 miles thick
15. can act like a solid or liquid based on amount of pressure
16. helped prove continental drift remains or impression of prehistoric organism in petrified form
17. mostly solid heats asthenoshpere
19. scientist that proposed the theory of continental drift but was rejected

1. 3rd layer about 1400 miles thick
3. a break in the rock in which both sides of the rock are moving
5. idea that continents were once together in a large landmass called pangea and have moved over time
8. convection occurs here layer is plastic like
9. crust and upper most part of mantle
10. based on 10 scale measures magnitude of earthquake
12. when a fault breaks it causes
13. rocks from space made of iron and nickel
17. 2nd layer about 1700 miles thick
18. there are layers of earth