about earth

4. 2nd layer about 1700 miles thick
6. measure intensity of earthquake based on eye witness accounts
8. crust and upper most part of mantle
9. last layer 780 miles thick
10. idea that continents were once together in a large landmass called pangea and have moved over time
12. when a fault breaks it causes
13. there are layers of earth
15. convection occurs here layer is plastic like
17. helped prove continental drift remains or impression of prehistoric organism in petrified form
18. first layer 20 miles thick

1. 3rd layer about 1400 miles thick
2. based on 10 scale measures magnitude of earthquake
3. sections that crust is broken into
4. mostly solid heats asthenoshpere
5. 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
7. rocks from space made of iron and nickel
11. large wave caused by earthquake underwater
14. scientist that proposed the theory of continental drift but was rejected
16. can act like a solid or liquid based on amount of pressure
17. a break in the rock in which both sides of the rock are moving