Across
- 3. part of the water cycle; process by which streams and rivers carry water that has fallen to the Earth back to the oceans
- 6. part of the water cycle; process by which water changes from a gas to a liquid
- 8. changing what is planted from year to year
- 9. the variety of plants and animals living on the planet
- 10. part of the water cycle; process by which water falls to the Earth
- 12. changes in temperature, wind direction and speed, and air moisture
- 13. thick haze of smoke and chemicals
- 14. powerful chemicals that farmers use to kill crop killing insects
- 15. the major wind systems that follow patterns that are similar overtime
- 17. cities showing a significant difference from surrounding areas in their climate zone
- 18. large land areas
- 19. the careful use of resources
- 22. steady flowing streams of water in the world seas
- 24. A layer of hot, dense rock about 1,770 miles thick
- 26. Hot iron mixed with other metals and rock; the center of the earth
- 27. part of the water cycle; the process by which water changes from liquid to a gas
- 30. when water, ice, chemicals, and plants break rocks into smaller pieces
- 32. chemicals in air pollution combined with precipitation
- 33. wind patterns that are typically only in small areas
- 34. another name for the Earth's crust
- 35. the system in which water moves from the Earth to the air and back to the Earth
- 36. underground layer of rock through which water flows
Down
- 1. crack in the Earth's crust
- 2. water that filters through the soil into the ground
- 4. areas such as rainforest, desert, grasslands, and tundra in which the plants and animals have adapted
- 5. cutting down forests without replanting
- 7. gases in the atmosphere that trap the sun's warmth
- 11. process in which water is collected and distributed to crops
- 16. very heavy rains fall on western South America causing floods; little rain in Australia Asia and Africa
- 18. areas that have the same or similar patterns of temperature and precipitation
- 19. the usual predictable patterns of weather in an area over many years
- 20. water, wind, and ice moves away weathered rock
- 21. theory on how continents were formed and why they move
- 22. upper layer of Earth
- 23. plateau off of a continent that lies under the ocean
- 25. sudden and violent movement of the Earth's crust
- 27. a place shared by plants and animals
- 28. effect that mountains have on rainfall that blocks rain from reaching interior regions
- 29. another name for the water found on Earth
- 31. deep cuts in the ocean floor
- 34. unusually cool waters and low rainfall in the Eastern Pacific; rains are heavy and typhoons occur