Natural Resources

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Across
  1. 4. fuels that are made from living things like corn or sugarcane
  2. 5. resources that nature cannot replace after they are used
  3. 6. heat that comes from the inside of Earth's core
  4. 7. resources that nature can replace when they are used
Down
  1. 1. energy that comes from the movement of flowing water
  2. 2. anything useful or necessary for living beings that occurs naturally on Earth
  3. 3. is the contamination of air, water, or soil by materials that are harmful to living things