Sc 8: pp 186-189

5. plate tectonics helps scientists understand topics, such as ___
6. heat at the ______ causes the formation of the plumes
8. mineral resources that are common near the sea-floor
10. valuable resources
12. ______ thickens with distance from a mid-ocean ridge
13. plate tectonics helps scientists understand many Earth's processes, such as ___
14. when ______ moves away from a mid-ocean ridge, the slab becomes older & denser
16. buildings here may be constructed to withstand damage from natural disasters

1. this would happen if multiple convection cells exist in the mantle beneath a single plate
2. any movement of matter that results from differences in density
3. theory of plate tectonics has had a great impact on ____
4. scientists have proposed as a cause of tectonic plate motion
7. scientists use _____ to explore the mantle
9. scientists have proposed as a cause of tectonic plate motion
11. plate tectonics helps scientists understand topics, such as ___
15. scientists have proposed as a cause of tectonic plate motion