What Makes Something Alive?

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Across
  1. 1. — To increase in size.
  2. 6. — A substance that all living things need to survive.
  3. 9. — To continue living.
  4. 11. — Everything surrounding an organism.
  5. 12. — To become different over time.
  6. 13. — To make offspring or more of the same kind of organism.
  7. 16. — The young produced by a parent organism.
  8. 17. — Something that is alive.
Down
  1. 2. — A single living thing.
  2. 3. — An example of a living organism that makes its own food.
  3. 4. — A mixture of gases that many organisms need to survive.
  4. 5. — A place that provides protection from the environment.
  5. 7. — An example of a living organism that gets energy by eating other organisms.
  6. 8. — Something living things need to survive and function.
  7. 10. — Something that provides energy for many organisms.
  8. 12. — The tiny building blocks that make up all living things.
  9. 14. — To react to something happening in the environment.
  10. 15. — Something that is not alive.