Across
- 5. a scientific theory that explains how major landforms are created as a result of Earth's subterranean movements.
- 6. a theory that the continents have moved over time
Down
- 1. cycles that occur in the air, ocean, and mantle.
- 2. process at work at divergent plate boundaries, leading to the creation of new ocean floor
- 3. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
- 4. change in planets magnetic field.