Across
- 2. light needed for photosynthesis to take place
- 4. state of matter without fixed volume and particles moving at random speeds in random directions
- 6. cannot be separated into simpler substance by chemical means
- 9. state of matter where particles are packed tightly and can vibrate
- 10. metal used to wire homes
- 12. the smallest unit of a chemical element
- 14. element that conducts heat and electricity poorly
- 16. reactant in photosynthesis
- 18. state of matter with a definite volume and particles can flow
- 19. substance with only one type of particle
Down
- 1. chemical reaction that happens in all living cells
- 3. needed for photosynthesis to take place
- 5. state of matter of the sun
- 7. the smallest naturally occurring particle of a substance. It may contain one type of atom (oxygen) or many thousands of atoms (protein).
- 8. product of respiration
- 11. substance made up two or more different elements chemically bonded together
- 13. element that is shiny and conducts heat and electricity
- 15. substances together but not chemically combined
- 17. metal used to make rings