Unit 7 Terminology

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Across
  1. 6. a buildup of heat at the earth's surface caused by energy from sunlight becoming trapped in the atmosphere
  2. 8. a pesticide or other material that is poisonous or harmful to an organism other than the target organism
  3. 9. colorless, odorless, and tasteless mixture of gases
  4. 11. colorless, odorless, and highly poisonous gas
  5. 16. material that is emitting radiation
  6. 17. pale-yellow element occurring widely in nature
  7. 19. heat and friction-resistant material
  8. 21. chemical used to control pests
Down
  1. 1. group of compounds consisting of chlorine, fluorine, carbon, and hydrogen used as aerosol propellants and refrigeration gas
  2. 2. process in which chlorophyll in green plants enables those plants to use light to manufacture sugar from carbon dioxide and water
  3. 3. colorless, poisonous, and oily liquid
  4. 4. a form of pollution consisting of small particles that are suspended in the air
  5. 5. any organism that adversely affects human activities
  6. 7. organic compound containing hydrogen and carbon
  7. 10. compounds containing nitrogen and oxygen
  8. 12. top layer of the earth's surface suitable for the growth of plant life
  9. 13. clear, colorless, tasteless, and nearly odorless liquid
  10. 14. colorless, radioactive gas formed by disintegration of radium
  11. 15. area or type of environment in which an organism or biological population normally lives
  12. 18. a process in which energy and carbon dioxide are released due to digestion or the breakdown of plant tissues during periods of darkness
  13. 20. compound that exists in limited quantities about 15 miles above earth's surface