Across
- 2. Earth's ______________ is broken into tectonic plates
- 3. area where one plate slides under another
- 5. long past plants and animals that serve as evidence of continental drift
- 6. two plates move toward each other
- 7. long, tall mountain in the middle of the ocean
Down
- 1. two plates move apart
- 2. hypothesis that continents are in constant motion
- 4. landform where magma erupts