Across
- 3. the outermost layer of the earth that we live on
- 4. The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle
- 6. A deep valley along the ocean floor through which oceanic crust slowly sinks towards the mantle
- 8. The soft layer below the lithosphere
- 9. The process by which molten material adds new oceanic crust to the ocean floor.
- 11. the largest layer of the earth, below the crust
- 12. The amount of mass in a given space
- 14. Plates that move away from each other
Down
- 1. a layer of molten iron and nickel that surrounds the inner core of the earth
- 2. The hypothesis that the continents slowly moved across the Earth's surface
- 3. Plates that move together
- 5. The undersea mountain chain where new ocean floor is produced; a divergent plate boundary.
- 7. A type of boundary in which two plates move by each other, can cause earthquakes
- 10. The hard, rigid layer made up of the crust and upper mantle
- 13. a dense sphere of solid iron and nickel in the center of the earth