Across
- 3. A plate boundary where two plates move away from each other.
- 5. animal that hunts other animals for food
- 10. species that enter new ecosystems and multiply, harming native species and their habitats
- 11. scale that tells how severe a tornado
- 13. the act of making something useful again, in this unit primarily making the land useful again
- 15. storm often accompanied by heavy precipitation and frequent thunder and lightning
- 17. A plate boundary where two plates move toward each other
- 18. The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations
- 20. fuels Coal, oil, natural gas
- 21. overflowing of a large amount of water beyond its normal confines, esp. over what is normally dry land
- 22. scale that rates an earthquake's magnitude based on the size of its seismic waves.
- 25. device that records ground movements caused by seismic waves as they move through Earth
- 26. large fire that spreads quickly over a natural area
- 28. height of land
- 30. lines that connect points of equal elevation
- 32. hurricane intensity scale that relates hurricane damage to wind speeds and central air pressures.
- 36. process of making new products from materials that were used in another product.
- 37. shaking that results from the movement of rock beneath Earth's surface.
- 39. removal of trees faster than forests can replace themselves.
- 40. a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.
Down
- 1. resources that can be replaced as fast as they are used
- 2. the action of reducing the severity, seriousness, or painfulness of something
- 4. theory that states the Earth's crust is not solid but broken up into many different pieces/plates
- 6. to use less of something
- 7. the process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge
- 8. boundary in which two plates slide past each other without creating or destroying lithosphere
- 9. measure of the impact human activities have on the environment in terms of the amount of greenhouse gases produced, measured in units of carbon dioxide
- 12. rapidly whirling, funnel-shaped cloud that reaches down to touch Earth's surface.
- 14. Organisms that make their own food
- 16. resource that cannot be replaced as fast as it is used
- 19. Elements found naturally on Earth; humans have found productive ways to use minerals to our benefit
- 23. large ocean wave generated by vertical motions of the seafloor during an earthquake
- 24. the variety of life in the world or in a particular habitat or ecosystem.
- 27. A community of organisms where there are several interrelated food chains
- 29. fierce tropical storms with strong winds
- 31. organism that obtains energy and nutrients by feeding on other organisms or their remains.
- 33. series of steps in which organisms transfer energy by eating and being eaten
- 34. Involves using a resource over and over in the same form
- 35. Organisms that break down the dead remains of other organisms
- 38. organism that is killed and eaten by another organism