Across
- 4. - the planet on which we live; the world.
- 5. - a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.
- 6. -a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapour, and gas are or have been erupted from the earth's crust.
Down
- 1. -a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.
- 2. - the physical universe beyond the earth's atmosphere.
- 3. -the action or process of moving or being moved.