SCIENCE

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Across
  1. 2. Waves
  2. 5. Used to listen to things
  3. 6. In the air
  4. 10. enter your eyes to see things
  5. 11. Without it you wouldn't live and your organs need it
  6. 12. You need them to see
Down
  1. 1. Every living thing one
  2. 3. galaxy
  3. 4. It enters your ear to hear things
  4. 7. There are plenty in your body and you need them to function
  5. 8. To see things
  6. 9. Animals
  7. 13. a chemical which can be dangerous and can be less dangerous