Section 1, 2, 3, 4

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Across
  1. 3. Is the amount of a substance in a given volume
  2. 4. Is a characteristic of a substance that describes its ability to change into another substance
  3. 6. Is a reaction that releases energy in the form of heat
  4. 7. Is a reaction in which energy is absorbed
  5. 9. In contrast to a synthesis reaction
  6. 12. Matters not allowed to enter or leave
  7. 14. when the reaction is complete and you have new substances
  8. 15. A material used to decrease the rate of a reaction
  9. 16. Is a characteristic of a substance that can be observed without changing the substance into another substance
  10. 18. The substances you have at the beginning
  11. 20. In chemistry when two or more elements or compounds combine to make more complex substance
  12. 22. Is the minimum amount of energy needed to start a chemical reaction
  13. 24. Is a short easy way to show a chemical reaction using symbols instead of words
  14. 26. When one element replaces another in a compound or when two elements in different compounds trade places
Down
  1. 1. A rapid reaction between oxygen and the substance
  2. 2. During a chemical reaction matter is not created or destroyed
  3. 5. Is anything that has mass and takes up space
  4. 8. Matter can enter from or escape to the surroundings
  5. 10. Is the number placed in front of a chemical formula in an equation
  6. 11. A change in matter that produces one or more new substances
  7. 13. Solid that forms from solution during a chemical reaction
  8. 17. Is any change that alters the form or appearance of a substance but that does not make the substance into another substance
  9. 19. The cells in your body contain biological catalysts
  10. 21. The study of matter and how matter changes
  11. 23. Is the material that releases energy when it burns
  12. 25. Is a material that increases the rate of a reaction by lowering the activation energy