Bubbles, Bangs and Burning

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Across
  1. 2. You will see this happening if you add sodium bicarbonate to acid.
  2. 3. Used as a fuel in some cars.
  3. 5. Colourless gas, which comes from the gas taps in the lab.
  4. 6. White substance found in some fire extinguishers.
  5. 10. Colourless gas, which makes up about 1/5 of the air we breathe.
  6. 11. The chemical that goes into a chemical reaction.
  7. 12. Colourless liquid that turns cloudy when carbon dioxide bubbles through it.
  8. 13. The chemical produced in a chemical reaction.
Down
  1. 1. If a fuel burns in a good supply of oxygen then carbon (?) is made.
  2. 4. Colourless chemical, made when fuel burns, which is very dangerous if used in the wrong way.
  3. 5. If a fuel burns in too little oxygen then carbon (?) is made.
  4. 6. A stored source of energy.
  5. 7. A type of energy, which is also named in the fire triangle.
  6. 8. These chips can be added to acid to make carbon dioxide.
  7. 9. Metal that burns with oxygen to make magnesium oxide.