Mr Burford's 4eme Chemistry crossword

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Across
  1. 1. This type of process is easy to reverse
  2. 3. The color of a flame releasing more heat
  3. 5. This is conserved in chemical reactions (remember Lavoisier!)
  4. 6. The type of combustion that produces smoke (carbon particles)
  5. 9. The color of a flame releasing less heat
  6. 11. Smoke is made of this element
  7. 12. A physical process used to separate alcohol from water
  8. 14. This type of process that is difficult to reverse
  9. 16. A chemical process that uses stomach acid and enzymes
  10. 17. A gas that is used a fuel in the home
Down
  1. 2. A poisonous gas released by incomplete combustion
  2. 4. A physical process using filter paper
  3. 5. A chemical process that occurs in cells (respiration is an example)
  4. 7. A chemical made of only one type of atom
  5. 8. Light, heat, sound, kinetic, electrical, sound are all forms of this
  6. 10. Energy is always_____from one form to another in chemical reactions
  7. 13. A chemical made of two or more different types of atoms bonded together
  8. 14. This type of combustion produces a blue flame
  9. 15. Oxidation of iron (a chemical process)