Combustion-by Math 7.4

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Across
  1. 1. Power source
  2. 3. It is what cars do
  3. 7. Can be different colors
  4. 9. It is bad
  5. 10. When something breaks down
  6. 11. When you light something
  7. 13. It is the bulk process of "boiling"
Down
  1. 2. Made up of atoms
  2. 4. When something gets hot
  3. 5. Chemical reaction
  4. 6. When an atom loses electrons
  5. 7. Most of the time it is red
  6. 8. Comes after something is burned
  7. 12. Thermal energy synonym