Glossary

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Across
  1. 3. Describes species that no longer exist.
  2. 6. Hazardous waste causing danger.
  3. 8. Natural environments absorbing waste.
  4. 10. The envelope of gases surrounding the earth
  5. 11. Part of Earth in which life exists.
  6. 12. The surroundings in which organisms live.
  7. 13. another planet.
Down
  1. 1. Humans are the superior species.
  2. 2. The natural environment of an organism.
  3. 4. All the water on earth.
  4. 5. The variety of life in the world.
  5. 7. The solid, outer layer of the earth.
  6. 9. Harmful materials put into the environment.