Changing planet

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Across
  1. 5. A large, dry area of land with very little water or rain.
  2. 8. A long, natural stream of water that flows into the sea
  3. 9. A mountain with a hole at the top that erupts with lava.
Down
  1. 1. Low areas of land located between hills or mountains.
  2. 2. A very high hill with steep sides and a sharp peak.
  3. 3. To change waste materials so they can be used again.
  4. 4. Damage caused to water, air, or land by harmful waste
  5. 6. Large bodies of water that are completely surrounded by land.
  6. 7. High areas of land that are smaller than mountains