Across
- 2. all the continents connected together as a supercontinent
- 4. Earth's continents were once joined together like a completed jigsaw puzzle. Then a force pulled them away from each other
- 5. a scientific theory that Earth's crust is made of moving plates
- 6. a scientist who examines rocks to find out about Earth's history and structure
- 8. deep cracks in Earth's crust
Down
- 1. as the ocean floor grows wider, the continents move farther apart
- 3. is a squeezing or a pushing together of the crust
- 7. when one plate rubs past another plate