Plate Tectonics
Across
- 3. we get _________ volcanoes mountain ranges and deep-sea trenches
- 4. this boundary occurs when 2 plate come together and forms either a mountain or a volcano
- 6. the first wave in an earthquake
- 8. magma rises because it is ______ dense
- 9. the San Andreas fault is this many miles long
- 12. this boundary occurs when 2 plates move apart
- 15. is a machine that measure the magnitude of an eathquake
- 17. the second wave in an earthquake
- 18. the earth has ___ this many plates
- 19. place where the earth slips
Down
- 1. can carry either the ocean floor of a continent sometime both
- 2. the layer we live on
- 5. there are this many boundaries
- 7. __________ is how many earthquakes happen a year
- 10. this person job is to build more stable buildings
- 11. no plate can________ without another _________
- 13. plates move this many inches a year
- 14. this boundary happens when 2 plates slip past each other moving in the opposite direction
- 15. this is a wave of energy that is released when an earthquake occurs
- 16. this moves plates