Across
- 2. a large community of plants and animals that occupies a distinct region defined by its climate and dominant vegetation
- 6. the science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products
- 8. a luxuriant, dense forest rich in biodiversity, found typically in tropical areas with consistently heavy rainfall
- 11. the variety of species and ecosystems on Earth
- 12. a type of forest characterized by trees that seasonally shed their leaves
- 13. the natural sequence through which water passes into the atmosphere as water vapor, precipitates to earth in liquid or solid form, and ultimately returns to the atmosphere through evaporation
- 15. a vast, flat, treeless Arctic region of Europe, Asia, and North America in which the subsoil is permanently frozen
- 16. a biological community of interacting organisms and their physical environment
- 17. AKA the "taiga," a Russian word meaning swampy moist forest, found in a nearly continuous belt across North America and Eurasia
- 18. a group of organisms or populations living and interacting with one another in a particular environment
- 19. the part of the earth and its atmosphere in which living organisms exist or that is capable of supporting life
- 20. a dry, barren area of land, especially one covered with sand, that is characteristically desolate, waterless, and without vegetation
Down
- 1. the exploitation of biological processes for industrial and other purposes, especially the genetic manipulation of microorganisms for the production of antibiotics, hormones, etc.
- 3. a series of naturally occurring processes where carbon is exchanged between organisms and the environment, including photosynthesis, decomposition, and respiration
- 4. the trapping of the sun's warmth in a planet's lower atmosphere due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface
- 5. the series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition
- 7. a large open area of country covered with grass, especially one used for grazing
- 9. the number of people, other living organisms, or crops that a region can support without environmental degradation
- 10. the total number of persons inhabiting a country, city, or any district or area
- 14. a gradual process in which something changes into a different and usually more complex or better form