Jayden’s science crossword puzzle

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Across
  1. 1. a unit used to measure mass
  2. 4. contains saliva
  3. 5. a system which digests food into simpler substances so that it can be used by the body
  4. 7. has mass and occupies space
  5. 12. produces flowers
  6. 16. allows light to pass through
  7. 18. has no definite shape but has definite volume
  8. 19. absorb sunlight for the plant to make food
  9. 21. protects the heart and lungs
  10. 22. keep the plant upright
  11. 23. burns down easily and is the trunk of a tree
  12. 24. measured using electronic balance
Down
  1. 2. has no definite volume
  2. 3. a system which protects delicate organs in the body
  3. 4. can be attracted by magnets
  4. 6. a system which works together with the skeletal system to move the body
  5. 7. a unit used to measure volume
  6. 8. occupies space
  7. 9. have scaly skin
  8. 10. push away each other
  9. 11. live underwater and have scales
  10. 13. does not absorb water
  11. 14. pull in each other
  12. 15. no digestion takes place here
  13. 17. reproduce by giving birth to their young
  14. 20. has definite shape and volume
  15. 21. absorb water and mineral salts from the soil