renewable and nonrenewable energy

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Across
  1. 1. what is the oldest renewable energy source
  2. 3. What type of energy can be reused or reformed after a brief period time
  3. 5. fuels what type of energy source has three major forms that are coal, oil, and natural gas
  4. 7. what type of energy helps us get electricity from water
Down
  1. 2. what power comes from the sun
  2. 4. what type of energy can take up to millions of years to form
  3. 6. what is the heat from the earth called