Changing Earth

4. occurs where plates push together
7. Drift a hypothesis proposed by Alfred Wegener
8. a place where heated rock rises in plumes, or in thin columns, from the mantle
10. a thin layer of cool rock
11. a fracture, or break in earth's lithosphere,along which blocks of rock move past each other
13. huge under water mountain ranges
15. a layer of hotter, softer rock in the upper mantle
16. the switch in direction where the north pole becomes the south pole and south pole becomes the north pole
19. a layer of liquid metals that surrounds the inner core

1. earth's crust and the very top of the mantle together
2. where ridges continue to widen, a gap forms called this
3. the shaking of the ground caused by the sudden movement of large blocks of rock along a fault
4. a motion that transfers heat energy in a material
5. occurs where plates scrape past each other
6. occurs where plates move apart
9. the force exerted when an object presses on, pulls on, or pushes against another object
12. earth's thickest layer
14. a ball of hot solid metals
17. Plates lithosphere is broken into many large and small slabs of rock
18. energy transfer by the movement of a material