Unit 6 - Planet Earth

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Across
  1. 3. a tropical forest in which trees and plants grow very closely together
  2. 8. an accident when oil comes out of its container, for example at sea
  3. 9. a large quantity of water that suddenly covers an area
  4. 11. the surroundings in which a person, animal, or plant lives
  5. 12. a raised part of the earth's surface, much larger than a hill, the top of which might be covered in snow
  6. 14. the salty water that covers a large part of the surface of the earth, or a large area of salty water, smaller than an ocean, that is partly or completely surrounded by land
  7. 16. an area of sand or small stones near the sea or another area of water such as a lake
  8. 17. A natural event such as a flood, earthquake, or hurricane that causes great damage or loss of life
  9. 19. to prevent time, money, or effort being wasted or spent
  10. 23. a forest in a tropical area that receives a lot of rain
  11. 24. an area of low land between hills or mountains, often with a river running through it
  12. 25. to sort and collect rubbish in order to treat it and produce useful materials that can be used again
  13. 26. a large area of land covered with trees and plants, usually larger than a wood, or the trees and plants themselves
  14. 28. a large area of water surrounded by land and not connected to the sea except by rivers or streams
Down
  1. 1. a thick layer of ice that permanently covers an area of land
  2. 2. an accident with nuclear power, usually causing radioactivity
  3. 4. the increase in the temperature on Earth
  4. 5. the part of the Earth's atmosphere which protects the earth from the sun
  5. 6. when heat cannot escape from the atmosphere and the temperature on Earth goes up
  6. 7. a group of hills or mountains
  7. 10. a long period of time when there is no rain
  8. 13. the process of making the air, water or land worse, with chemicals, for example
  9. 15. when ice turns to water
  10. 18. an unnecessary or wrong use of money, substances, time, energy, abilities, etc.
  11. 20. an area, often covered with sand or rocks, where there is very little rain and not many plants
  12. 21. a natural wide flow of fresh water across the land into the sea
  13. 22. a piece of land completely surrounded by water
  14. 27. a very large area of sea