What's the Matter?

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Across
  1. 1. a characteristic of a substance that describes its ability to change into other substances
  2. 3. a characteristic of a substance that can be observed without changing the substance into another substance
  3. 4. A rapid reaction between oxygen and fuel that results in fire
  4. 5. A material that releases energy when burned
  5. 9. a solid that forms from solution during a chemical reaction
  6. 10. a short and easy way to show a chemical reaction, using symbols instead of words
  7. 11. a reaction in which energy is absorbed
  8. 13. A number in front of a chemical formula in an equation that indicates how may molecules or atoms of each reactant and product are involved in a reaction
  9. 14. the study of matter and how matter changes
  10. 16. A system in which matter can enter or escape to the surroundings
  11. 17. A material that increases the rate of a reaction by lowering the activation energy
  12. 20. anything that has mass and takes up space
  13. 22. any change that that alters the form or appearance of a substance but that does not make the substance into another substance
  14. 23. a change in matter that produces one or more new substances
  15. 24. A chemical reaction in which two or more simpler substances combine to form a new, more complex substance
  16. 25. during a chemical reaction, matter is not created or destroyed. All atoms present at the start if the reaction are present in the end.
  17. 26. A material that decreases the rate of a reaction
Down
  1. 2. A system in which no matter is allowed to enter or leave
  2. 6. A reaction that releases energy in the form of heat
  3. 7. A biological catalyst that lowers the activation energy an electron has
  4. 8. The amount of one material ina certain volume of another material
  5. 12. new substance when the reaction is complete
  6. 15. The minimum amount of energy needed to get a chemical reaction started
  7. 18. the substance you have at the beginning
  8. 19. A reaction in which one element replaces another in a compound or when two elements in different compounds trade place
  9. 21. A chemical reaction that breaks down compounds into simpler products