Plate Tectonics
Across
- 4. Weaker, upper portion of the Earth's mantle.
- 6. The dense, innermost layer of the Earth.
- 7. Can occur with lava from volcanoes.
- 8. Combination of Earth's outermost layer and the upper mantle; is divided into tectonic plates.
- 9. Can include bones, footprints, leaf prints, or being cast in a substance.
- 13. Large section of hard, solid rock that make up earth's outermost layer.
- 14. Hot liquid rock that is on Earth's surface.
- 15. Underwater mountain range made by divergent plate boundaries.
- 17. Northern continental mass formed when Pangaea broke apart approximately 180 million years ago.
- 18. Any of Earth's main continuous areas of land, such as Africa.
- 19. The thin, outermost layer of the Earth, types include oceanic and continental.
- 20. Two plates sliding past each other.
Down
- 1. The large, single continental landmass that formed approximately 245 million years ago.
- 2. Two plates moving away from each other.
- 3. Process of one plate moving under another plate.
- 5. A deep indentation in the ground that is made by convergent plate boundaries.
- 6. Early idea that continents float on the mantle and moved relative to one another over geologic time.
- 7. Commonly caused by transform plate boundaries.
- 10. Hot liquid rock that is below Earth's surface.
- 11. Southern continental mass formed when Pangaea broke apart approximately 180 million years ago.
- 12. Mountains, channels, and sand dunes are an example of a _______.
- 15. A layer of soft, solid rock under Earth's plates, serves as the middle layer of the Earth.
- 16. Two plates moving towards each other.