Across
- 3. sideways or downward movement of tectonic plates
- 6. rigid, outermost shell of a terrestrial-type planet
- 7. a person who studies the properties of the earth
- 8. A microscopic single-celled plan
- 10. An instrument that detects Earth motions.
- 13. a common type of carbonate sedimentary rock
- 16. a natural science about the earth
- 17. A vertical section of water from the surface to the bottom of a body of water.
- 19. A measure of the strength of an earthquake.
- 21. sample of sediment
- 23. period during which thick ice sheets cover vast areas of land
- 26. An extremely fine-grained sedimentary rock
- 27. seven massive plates
- 28. fine-grained extrusive igneous rock
- 29. Said of sediments disturbed by organisms.
- 30. scientist that formulates the theory of tectonic plates
Down
- 1. outer layer of the earth
- 2. coarse-grained igneous rock
- 4. device that measures the speed and direction of ocean currents.
- 5. An apparatus used to take sections of sediment from the seafloor
- 9. liquid layer of the earth
- 11. solidified lava
- 12. mostly-solid bulk of Earth's interior
- 13. hot liquid
- 14. Aquatic animals, mostly microscopic, that have a planktonic lifestyle.
- 15. the system to measure the strength of an earthquake
- 18. A gravitational sea wave
- 20. a supercontinent that incorporated almost all the landmasses on Earth
- 22. process in which plants make organic compounds from carbon dioxide and water using the energy of sunlight
- 24. The horizontal or vertical flow of water
- 25. solid layer of the earth