Knowledge Check

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Across
  1. 3. a gas which forms a layer between the troposphere and stratosphere
  2. 6. combination of smoke and fog
  3. 9. formation of deserts in arid and semi-arid regions due to changes in climate and overgrazing
  4. 11. gases that are released mainly from air-conditioning systems and refrigeration
  5. 12. energy derived from magma
  6. 13. energy derived from the sun
  7. 14. a poisonous chemical that was used to protect plants from harmful insects
Down
  1. 1. a change in climate which is attributed directly or indirectly to human activity that alters the composition of the global atmosphere
  2. 2. oil, coal and natural gas
  3. 4. a change in the physical, chemical or biological conditions of the environment which harmfully affects the quality of life of all organisms
  4. 5. destruction of forest
  5. 7. phenomenon that occurs when dinoflagellates increase in number tremendously causing seawater to discolor
  6. 8. energy created when nuclei of atoms are split apart
  7. 10. unwanted sound
  8. 11. weather pattern of a place over a long period of time