Science quiz

12345678910
Across
  1. 1. touch,smell,photo alert us to problems
  2. 4. is left behind salt water
  3. 7. tubes that carry air
  4. 10. regulates your heartbeat,breathing,body,temperature
Down
  1. 2. 70% of brain mass
  2. 3. can change shapes,location,states
  3. 5. 300,000,000 air sacs that hold air
  4. 6. two materials combined
  5. 8. not visible,colorless,transparent
  6. 9. takes up space