CR TEST REVIEW

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Across
  1. 2. Observations that show a reaction occurred
  2. 3. Thermal energy transferred between objects
  3. 4. Evidence that substances have changed into new substances
  4. 6. Substance formed after a chemical reaction
  5. 10. Evidence involving gas, precipitate, or color change
  6. 12. Evidence of a chemical reaction involving bubbles
  7. 13. Solids formed during a reaction in solution
  8. 15. The part of the universe being studied
  9. 17. A reaction that absorbs heat energy
  10. 19. Evidence of a chemical reaction involving a change in color
  11. 21. Takes in energy during a reaction
  12. 22. When atoms rearrange, they form these substances
  13. 23. When atoms rearrange, their connections change
  14. 25. A change where the substance stays the same
  15. 26. The smallest unit of an element
  16. 28. A system where matter cannot enter or leave
  17. 31. A comparison group in an experiment
  18. 32. A change where a new substance forms
  19. 34. A sign of gas formation
  20. 35. The principle that matter is not created or destroyed
  21. 36. A system where matter can escape
Down
  1. 1. A measure of average kinetic energy
  2. 5. The standard used for comparison in experiments
  3. 7. Substance present before a chemical reaction
  4. 8. A reaction that produces new substances
  5. 9. Gives off energy during a reaction
  6. 11. The law stating matter is not created or destroyed
  7. 13. A change where no new substance forms
  8. 14. Two or more atoms bonded together
  9. 16. When total mass stays the same before and after a reaction
  10. 18. A solid that forms when two liquids react
  11. 20. The ability to cause change or do work
  12. 24. A reaction that releases heat energy
  13. 27. A first model of a solution used in engineering
  14. 29. The amount of matter in an object
  15. 30. Mixing salt and water without forming a new substance is this type of change
  16. 33. Anything that has mass and takes up space