Environmental Science

4. Addition of water to plants to supplement that provided by rain or snow
5. Movement of water to surface, to atmosphere, to surface
10. Dead plant and animal tissue that originates from living sources such as plants, animals, insects, and microbes
12. Of or pertaining to the household
14. An area of land with little to no rainfall
17. Compound that exists in limited quantities about 15 mile’s above the Earth’s surface
18. Colorless, odorless, and tasteless mixture of gases
19. Formation of rain and snow
20. A process in which energy and carbon dioxide are released due to digestion or the breakdown of plant tissues during periods of darkness
21. Chemical used to control pests
23. Clear, colorless, tasteless, and nearly odorless liquid
24. Pale-yellow element occurring widely in nature
25. Free of harmful chemicals and organisms

1. Wearing away
2. Process in which chlorophyll in green plants enables those plants to use light to manufacture sugar from carbon dioxide and water
3. Interdependence of plants or animals on each other for food
6. Close-growing crop planted to protect the soil and prevent erosion
7. Town having a harbor for ships to take on cargo
8. Material that dissolves or otherwise changes most other materials
9. Material that supplies nutrients for plants
11. Material placed on soil to break the fall of raindrops (preventing erosion), prevent weeds from growing, or improve the appearance of the area
13. Changing from a liquid to a vapor or gas
15. Area of type of environment in which an organism or biological population normally lives
16. Amount and type of nutrients in the soil
19. Any organism that adversely affects human activities
22. Top layer of the earth’s surface suitable for the growth of plant life
23. Level below which soil is saturated or filled with water