Unit 2 Summative Review

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Across
  1. 3. an example of a chemical reaction
  2. 4. energy is being released from the system
  3. 5. energy is being absorbed
  4. 8. subatomic particle responsible for bonding
  5. 10. a material in which waves travel through
  6. 13. Bond that shares electrons
Down
  1. 1. systems want to be ______.
  2. 2. uses mass and velocity to calculate
  3. 6. a chemical reaction in your stomach/gut
  4. 7. a flammable gas that was used in the Hindenburg
  5. 9. you need 2 or more to create a molecule
  6. 11. Bond that takes or gives an electron
  7. 12. stored energy
  8. 14. this is needed to break bonds