Unit one Enviro Sci puzzle

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Across
  1. 1. Group of organisms that can have fertile offspring
  2. 6. Important nutrient in fruits, veggies, dark bread
  3. 9. Zones that prove Earth is round
  4. 11. Most important product from crude oil
  5. 12. Goal of Enviro sci, to help people live...
Down
  1. 2. Branch of natural science that studies energy
  2. 3. a possible answer educated by research
  3. 4. He killed up to 80 million Chinese people
  4. 5. use of scientific method to gain knowledge
  5. 7. Public health started in response to this epidemic
  6. 8. Stored or hidden energy
  7. 10. Hybrid of lion father, tiger mother