Physical vs Chemical Changes Review

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Across
  1. 4. a state of matter which has a fixed volume, but no fixed shape
  2. 5. the basic unit of a chemical element
  3. 7. a liquid turning into a gas through the addition of energy; a physical change
  4. 11. another word to describe a chemical change
  5. 12. solid particles formed or separated out of a liquid; evidence of a chemical change
  6. 13. chemical digestion uses these chemicals to speed up reactions
  7. 16. a change in this means an increase or decrease of heat energy in a substance; may be evidence of a chemical change
  8. 19. a change in the way something reflects light; can indicate a chemical change
  9. 20. a change that involves substances being pulled apart or combined to form completely different substances
  10. 22. a chemical reaction in plants that changes carbon dioxide and water into oxygen and water
  11. 23. a group of atoms bonded together; may be the same or different elements
  12. 25. a characteristics that can be observed or measured only when atoms rearrange during a chemical change
  13. 27. distinct forms of matter: solid, liquid, gas; also referred to as phases
  14. 28. a substance with unique chemical and physical properties formed when two or more elements are chemically bonded during a chemical reaction
Down
  1. 1. the universal solvent, dissolves the most substances
  2. 2. breaking food down into nutrients
  3. 3. evidence that a gas is formed
  4. 6. anything that has volume and mass
  5. 8. breaking type of digestion that uses physical means (grinding, tearing, mashing)
  6. 9. state of matter that expands to fill its container and has no fixed shape or volume
  7. 10. usually a physical change, the even distribution of molecules within a solvent
  8. 12. a characteristic that can be observed or measured without changing the substance
  9. 14. physical and chemical characteristics of matter used to describe or identify a substance
  10. 15. a solid turning into a liquid through the addition of energy; a physical change
  11. 17. a pure substance composed of the same type of atom throughout
  12. 18. a liquid turning into a solid through the removal of energy; a physical change
  13. 21. the state or process of rotting or decay; a chemical change
  14. 24. a state of matter with a fixed volume and shape
  15. 26. a change to a substance that occurs without forming a new substance