about earth

1. there are layers of earth
4. 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
8. first layer 20 miles thick
9. scientist that proposed the theory of continental drift but was rejected
10. helped prove continental drift remains or impression of prehistoric organism in petrified form
12. large wave caused by earthquake underwater
13. mostly solid heats asthenoshpere
15. based on 10 scale measures magnitude of earthquake
16. can act like a solid or liquid based on amount of pressure
18. when a fault breaks it causes

1. a break in the rock in which both sides of the rock are moving
2. idea that continents were once together in a large landmass called pangea and have moved over time
3. measure intensity of earthquake based on eye witness accounts
5. convection occurs here layer is plastic like
6. last layer 780 miles thick
7. crust and upper most part of mantle
11. 3rd layer about 1400 miles thick
13. rocks from space made of iron and nickel
14. sections that crust is broken into
17. 2nd layer about 1700 miles thick