Across
- 1. undersea valleys that are the deepest part of the ocean
- 3. an idea that can be tested by investigation or experimentation
- 4. the sinking movement of ocean floor back into the mantle
- 6. the idea that the continents of the Earth have moved around the world over the course of millions of years
- 8. rock that comes from other rock being given lots of heat and pressure
- 10. the outermost layer of the Earth, mostly solid rock with small amounts of metal and magma
- 12. rock that comes from smaller rocks and/or living matter being pushed together
- 13. the man who came up with the hypothesis of continent drift
- 14. The Earth's crust is broken up into these large slabs of rock
- 15. a super continent that existed at the time of the dinosaurs, was made up of all the current continents combined to form one massive landmass.
Down
- 2. these currest in the mantle push the tectonic plates to move around
- 5. long zipper-like chains of undersea mountains
- 7. rock that comes from magma or lava cooling
- 9. the layer below the crust, made up of a mix of magma and rock
- 11. the process of magma rising out of cracks in the Earth's crust and hardening into new rock at the bottom of the ocean