Changing Earth

1. a hypothesis proposed by Alfred Wegener
3. a motion that transfers heat energy in a material
9. lithosphere is broken into many large and small slabs of rock
12. occurs where plates move apart
13. occurs where plates scrape past each other
16. a ball of hot solid metals
17. the shaking of the ground caused by the sudden movement of large blocks of rock along a fault
18. huge under water mountain ranges
19. where ridges continue to widen, a gap forms called this

1. occurs where plates push together
2. a thin layer of cool rock
4. a layer of liquid metals that surrounds the inner core
5. a place where heated rock rises in plumes, or in thin columns, from the mantle
6. earth's crust and the very top of the mantle together
7. energy transfer by the movement of a material
8. earth's thickest layer
10. the force exerted when an object presses on, pulls on, or pushes against another object
11. a layer of hotter, softer rock in the upper mantle
14. a fracture, or break in earth's lithosphere,along which blocks of rock move past each other
15. the switch in direction where the north pole becomes the south pole and south pole becomes the north pole