EXO/ENDO

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Across
  1. 4. the process by which one or more substances change
  2. 7. Absorbs heat and energy
  3. 8. a group of atoms bonded together
  4. 9. energy energy that comes from heat
  5. 10. the smallest unit of an element
Down
  1. 1. a chemical reaction where heat is absorbed
  2. 2. A substance that takes part in and undergoes change during a chemical reaction
  3. 3. a substance produced during a chemical reaction
  4. 5. gives off heat and energy
  5. 6. a chemical reaction where heat is released