Across
- 4. A convergent boundary where volcanic mountains and a deep-sea trench are formed.
- 5. A long, narrow valley formed at a divergent continental boundary
- 8. Circular currents in the mantle caused by the magma being heated by the core of the Earth.
- 11. Earth's thickest layer made of hot rock and is less dense than the core, less hot, and has less pressure on it. Magma like consistency.
- 14. The name given to the landmass when the continents were all joined as one supercontinent.
- 15. The soft layer of the mantle on which the lithosphere floats.
- 17. A rigid layer made up of the uppermost part of the mantle and the crust.
- 18. The theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle.
- 20. Occur at all plate boundaries, where plates slide past eachother.
- 21. A convergent boundary takes place, and continents push against each other, creating fold mountains.
Down
- 1. Where two plates slide past each other.
- 2. Where a plate overtakes another and the denser plate goes underneath the less dense plate.
- 3. A boundary where two plates are moving toward each other, going to collide.
- 6. An undersea mountain chain where new ocean floor is produced at a divergent plate boundar
- 7. Sections of the Earth's lithosphere that move
- 9. A convergent boundary where volcanic islands and a deep-sea trench are formed.
- 10. The thin outer layer of the earth that contains the earth's continents
- 12. A boundary where two plates are moving away from each other.
- 13. Theory by Alfred Wegener that the continents on tectonic plates move.
- 16. the innermost part of the earth, a dense sphere of solid iron and nickel at the center of Earth
- 19. a layer of molten iron and nickel (liquid) that surrounds the inner core of Earth