Vocabulary Crossword

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Across
  1. 4. The process of obtaining coal
  2. 5. Power generated by a nuclear reactor
  3. 6. Non-Renewable energy sources
  4. 8. Occurs naturally underground
  5. 9. The sun
  6. 12. Resources that occur in nature
Down
  1. 1. natural substances that cant replenish
  2. 2. Water wall
  3. 3. Can be converted into clean types of energy
  4. 7. The total quantity or weight of organisms in a given area
  5. 10. Type of fossil fuel
  6. 11. Obtained when mining