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