Across
- 3. substances not chemically bonded
- 4. makes proteins
- 6. ability to do work
- 8. system that exchanges gases
- 9. system that removes waste
- 12. energy due to particle movement
- 13. two or more atoms joined together
- 17. substance made of two or more elements
- 19. stored energy
- 21. controls the cell, contains DNA
- 24. energy of movement
- 26. site of photosynthesis in plant cells
- 27. a testable prediction
Down
- 1. cell with a nucleus
- 2. system that breaks down food
- 5. cell without a nucleus
- 7. produces energy for the cell
- 10. basic unit of life
- 11. energy stored in bonds
- 14. wall supports and protects plant cells
- 15. jelly-like substance where reactions occur
- 16. energy carried by light waves
- 18. smallest particle of an element
- 20. system that sends electrical messages
- 22. membrane controls what enters and leaves the cell
- 23. pure substance made of one type of atom
- 25. system that transports blood and nutrients