The Science Crossword

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Across
  1. 3. The body's military force
  2. 6. What does the Earth have that other planets don't?
  3. 7. What body system is the stomach in ?
  4. 9. Transporter of signals of the body
  5. 10. Increase in strength when lots of Calcium
  6. 12. The body's way of taking out the trash
Down
  1. 1. group of cells
  2. 2. Reason why we have 8 billion people
  3. 4. You go to the gym to upgrade it
  4. 5. Your cells upgrading to be more complex
  5. 8. what does all organism have in common?
  6. 11. When groups work to achieve a single goal