Sources of energy

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Across
  1. 6. A tall structure with large blades that spin when the wind blows and is used to create electricity.
  2. 8. Something that cannot be easily replaced after it's used.
  3. 10. Something that doesn't run out, like a never-ending supply.
  4. 12. To figure out the specific thing you are seeing, hearing, or thinking about.
  5. 13. A big, artificial lake where water is stored.
  6. 14. To crush something, usually grains like wheat, into a fine powder called flour.
Down
  1. 1. A tall building with large blades that are turned by the wind to do work.
  2. 2. When two or more things hit each other with force.
  3. 3. When two tiny parts of atoms smash together and join .
  4. 4. A big oven or heater that burns fuel (like gas, oil, or wood) to create heat.
  5. 5. Toothed wheels that work together to move parts of a machine and change their speed or direction.
  6. 7. A machine that turns movement into electricity.
  7. 9. To make something full or complete again by adding what was lost or used.
  8. 11. To save things and use them well so they don't run out quickly.