Environmental Science

3. existing in finite quantity; not capable of being replenished
4. the presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects
5. study how water moves across and through the Earth's crust
8. the outermost layer of rock of which a planet consists, especially the part of the earth above the mantle
10. non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems
11. the region of the earth's interior between the crust and the core, believed to consist of hot, dense silicate rocks
12. a large area covered chiefly with trees and undergrowth
14. an individual animal, plant, or single-celled life form
15. a large open area of country covered with grass, especially one used for grazing
16. relating to or denoting energy derived from the sun's rays
17. an animal that is hunted and killed by another for food
18. a living organism that shapes its environment
19. a dry, barren area of land, especially one covered with sand, that is characteristically desolate, waterless, and without vegetation

1. an animal that naturally preys on others
2. an expert in or student of the behavior, physiology, classification, and distribution of animals
4. an organism that produces organic compounds from simple substances such as water and carbon dioxide
6. the ability to be maintained at a certain rate or level
7. includes the habitats around the world that are dominated by water
9. the destruction of something, especially waste material, by burning
13. materials or substances such as minerals, forests, water, and fertile land that occur in nature and can be used for economic gain
20. a vast, flat, treeless Arctic region of Europe, Asia, and North America in which the subsoil is permanently frozen