Across
- 2. distance north or south of the equator measured in degrees
- 4. plants such as orchids that use the entire surface of a tree as a place to live
- 9. precipitation such as rain, sleet, or snow that contains high concentration of acids
- 11. mining method used when ore deposits are located close to Earth’s surface
- 12. primarily used as an insulator or fire retardant
- 14. when coral turns white due to sudden changes in their habitat
- 17. water that is safe to drink
- 18. a large region characterized by a specific type of climate and certain types of plant and animal communities
- 20. the ability of rock or soil to allow water to flow through it
- 21. weather conditions such as temperature, humidity, and winds in an area over a long period of time
- 22. the bottom-dwelling organisms such as mussels and worms
- 26. an underground formation that contains groundwater
- 27. water that contains waste from homes or industry
- 28. amount and type of food a person consumes
- 30. when a river is dammed this will form behind the dam
Down
- 1. process by which land in arid or semi-arid areas becomes desertlike due to human activity or climate change
- 3. water beneath the Earth's surface in sediment and rock formations
- 5. crushed ore is melted at high temperatures in furnaces to separate impurities from molten metal
- 6. process of returning land to its original condition after mining
- 7. the height of an object above sea level
- 8. unit that measures intensity of sound
- 10. deep layers of the Earth's surface that remain permanently frozen in the tundra
- 13. the sinking of regions of the ground with little or no horizontal movement
- 15. land that can be used to grow crops
- 16. a colorless gas with a strong odor
- 19. a naturally occurring inorganic solid that has chemical composition and characteristic set of physical properties
- 23. a machine that moves gases through a spray of water to dissolve any pollutants
- 24. condition that occurs when people do not consume enough Calories or a variety of food
- 25. swamps found in tropic and subtropic zones that help to protect the coastline from erosions and harsh storms
- 29. pollution when the temperature of a body of water increases killing all living organisms