Endangered Ecosystem

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 5. The washing away of ___ by the flow of water (11)
  2. 7. Air pollution by a mixture of smoke and fog (4)
  3. 8. The state of being clear of trees (13)
  4. 9. Atmospheric moisture or dust or smoke that causes reduced visibility (4)

Down

  1. 1. A building with glass walls and roof (10)
  2. 2. Exhibiting or caused by ___ (11)
  3. 3. A slide of a large mass of dirt and rock down a mountain or cliff (9)
  4. 4. Undesirable state of the natural environment being contaminated with harmful substances as (9)
  5. 6. An area of the ___ layer that is seasonally depleted of ___ (9)