Crct Words to Know

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 3. A community of organisms where there are several interrelated ___ chains (7)
  2. 5. A group of people having a religion, ethnic, profession (9)
  3. 8. How plants make food from sunlight (14)
  4. 11. The ratio of live ___ in an area to the population of that area (9)
  5. 12. A common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas (8)
  6. 13. An animal or plant that lives in or on a host (8)
  7. 14. A vast treeless plain in the Arctic regions where the subsoil is permanently frozen (6)
  8. 16. Land where ___ or ___ vegetation grows and is the dominant form of plant life (9)

Down

  1. 1. No longer active (10)
  2. 2. The number of inhabitants in a given place (10)
  3. 4. A person who invites guests to a social event and who is responsible for them while they are there (4)
  4. 6. Migration into a place (11)
  5. 7. The type of environment in which an organism or group normally lives or occurs (7)
  6. 9. Any animal that lives by preying on other animals (8)
  7. 10. An approximate calculation of quantity or degree or worth (8)
  8. 15. Dry land with very little rain (6)