Across
- 4. This plate boundary occurs when oceanic crust sinks under continental crust
- 5. Alfred ______ is the father of continental drift and plate tectonics
- 6. This plate boundary occurs when two plates move away from each other
- 7. this is formed at a subduction plate boundary
- 8. This plate boundary occurs when two plates slip past each other
Down
- 1. This is the upper portion of the mantle. Plates slide on this layer.
- 2. a crack or break in the lithosphere is called a ___.
- 3. This plate boundary occurs when two plates move toward each other