Across
- 4. Waves that go through the earth and come from earthquakes or explosions.
- 8. The Inmost layer of the earth’s interior.
- 11. The sphere that surrounds the earth that protects form solar wind.
- 13. The top layer of the Earth.
- 14. An Igneous rock that comprises most continental crust.
- 15. A weak spot in the crust that can form Islands.
- 16. Rocks formed by heat and pressure.
- 17. The largest layer of the earth’s interior.
- 18. The study of the earth and how it was formed.
Down
- 1. A theory that explains many geologic phenomena.
- 2. Rocks formed by volcanic activity.
- 3. Harmful ions shot from the sun.
- 5. A tool that measures the intensity of earthquakes.
- 6. The process of separation of heavy and light materials within the earth’s layers.
- 7. An Igneous rock that comprises most oceanic crust.
- 9. When a wave changes direction when entering a substance.
- 10. Rocks formed by sediments being compressed.
- 12. The main unit of large distance in the metric system.