Science Vocabulary
Across
- 6. boundary A plate boundary where two plates move away from each other
- 9. The preserved remains or traces of an organism that lived in the past
- 10. drift The hypothesis that the continents slowly move across Earth's surface
- 11. The super continent that broke apart 200 million years ago
Down
- 1. A break in Earth's crust along which rocks move
- 2. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary
- 3. boundary A plate boundary where two plates move toward each other
- 4. ridge An undersea mountain chain where new ocean floor is produced
- 5. spreading The process where molten material adds new oceanic crust to the ocean floor
- 7. boundary A plate boundary where two plates move past each other in opposite directions
- 8. valley A deep valley that forms where two plates move apart
- 11. tectonics The theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle