Unit 4

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Across
  1. 2. catching fish from rivers, lakes, or the sea
  2. 4. a mix of smoke and fog that makes the air dirty
  3. 5. life plants and animals that live in the sea
  4. 9. a large structure made by sea animals
  5. 10. a long period with little or no rain
  6. 11. a large uncontrolled fire in nature
  7. 12. a period of extremely hot weather
  8. 14. a strong snowstorm with strong winds
Down
  1. 1. very small pieces of plastic in the water
  2. 3. unwanted materials thrown away
  3. 5. plants that grow in the sea
  4. 6. a very strong storm with heavy rain and winds
  5. 7. a steady movement of water in the sea
  6. 8. water from the sea that contains salt
  7. 13. water covering land that is usually dry