Across
- 2. 1st theory describing the history of the Earth's surface.
- 3. Huge pieces of lithosphere that slowly move on the asthenosphere.
- 5. Circular movement of fluids caused by the rising of hotter, less dense fluid and the rising of cooler, denser fluid.
- 6. The amount of matter in a given space or volume.
Down
- 1. 2nd theory describing the history of the Earth's surface.
- 4. Supercontinent that incorporated most all of the landmasses on Earth.