Across
- 1. outermost layer of the Earth
- 3. Ridge A mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics
- 4. Ocean Trenches A deep valley along the ocean floor through which oceanic crust slowly sinks towards the mantle
- 8. boundary boundary between two plates that are moving apart
- 10. The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle
- 12. rigid layer of Earth's surface made up of the crust and part of the upper mantle
- 14. boundary place where two plates move together
Down
- 2. Spreading Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge
- 5. The destructive process in which water or wind loosen and carry away fragments of rock
- 6. boundary plate boundary that forms when two plates slide past each other
- 7. plasticlike layer of the Earth's surface below the lithosphere
- 9. drift hypothesis that the continents have moved slowly to their current locations
- 11. current cycle of heating, rising, cooling, and sinking
- 13. sections of the lithosphere