Across
- 3. A deep valley along the ocean floor through which oceanic crust slowly sinks towards the mantle in a process known as subduction.
- 4. Feild The area of magnetic force around a magnet.
- 6. Proposed the theory of seafloor spreading.
- 7. Plates Sections of the Earth's crust that move due to convection currents.
Down
- 1. A usually light-colored igneous rock that is found in continental crust.
- 2. The process of by which oceanic crust sinks beneath a deep ocean trench and back into the mantle at a convergent plate boundary.
- 4. Ridge An undersea mountain chain where new ocean floor is produced created by a divergent plate boundary.
- 5. A dark, dense, igneous rock with a fine texture, found in the oceanic crust.