Across
- 2. the invisible mixture of gases that surrounds the Earth
- 5. allowing animals to graze to the point of damaging vegetational cover
- 8. having temperatures that are not too hot or too cold
- 11. an organism requiring food by preying on other organisms or by eating particles of organic matter
- 12. a biome with thick growth of trees and bushes that covers a large area
- 13. the whole mass of air that surrounds the Earth
- 14. continuous movement of water or air in the same direction
- 16. the main source of energy of planet earth
- 17. having a very low temperature
- 20. a part of the planet’s circulatory system
- 21. the height of a place
- 22. the planet we live in
- 24. the temperature and other outside conditions at a particular time and place
- 25. the average course or condition of the weather at a place usually over a period of years
- 26. a key subfield of environmental science
Down
- 1. biological diversity
- 3. an area of dry land especially in southern California that is covered with bushes and short trees
- 4. a layer of soil that is always frozen in very cold regions of the world
- 6. the physical world and everything in it that is not made by people
- 7. a large flat land in northern parts of the world where there are no trees and the ground is always frozen
- 9. land covered with grasses and other soft plants but not with bushes and trees
- 10. a set of organisms interacting with one another and with their nonliving environment
- 15. an area of land that rises very high above the land around it
- 18. distance north or south of the equator measured in degrees up to 90 degree
- 19. a biome where annual precipitation is low and often scattered unevenly throughout the year
- 23. a major ecological community type