Across
- 2. The planet we live on.
- 4. To watch carefully and attentively.
- 9. The upper layer of the earth's mantle, but is below the lithosphere
- 13. Machinery and equipment developed from such scientific knowledge.
- 14. The study of materials to establish facts and reach new conclusions.
- 16. A person who studies the physical or natural sciences.
- 17. Record in detail the spatial distribution of something.
- 18. Summarizes a hypothesis that has been supported by many tests.
- 19. There are 2 of these on different sides of the U.S.
- 20. The outside of something.
Down
- 1. The solid, outermost layer of the Earth, lying above the mantle.
- 3. The remains of prehistoric organisms.
- 5. Available facts indicating whether a belief is true or false.
- 6. This man wrote the book "The Origin of Continents and Oceans."
- 7. It was also called the "super continent".
- 8. A theory explaining the structure of the earth's crust
- 10. An educated guess based on observation.
- 11. There are 7 of these.
- 12. Ridge General term for an underwater mountain system, consisting of various mountain chains.
- 15. The ocean on the East of the United States.