Across
- 1. Where 2 or more of Earth's plates meet.
- 4. Size of an earthquake
- 5. Time periods of thousands, millions, and billions of years.
- 7. The idea that the continents were once joined together to form a single large continent, which over time broke up and slowly moved great distances apart.
- 8. Sections of Earth's lithosphere that float on the mantle
- 10. A plate boundary where two plates slide past each other.
- 11. The process of one plate sliding under another.
- 12. A deep, narrow depression on the sea floor.
- 13. The solid layer of Earth’s crust and upper mantle.
Down
- 1. The theory that the Earth’s lithospheric plates are in constant motion.
- 2. A large underwater volcanic mountain chain
- 3. A plate boundary where two plates divide(pull apart).
- 6. The weak, soft layer of the mantle 100-250 km below Earth's surface
- 9. A plate boundary where two plates collide or crash into each other.