Chemical changes

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Across
  1. 3. a chemical reaction forms these kinds of substances that weren’t there before
  2. 4. a common chemical change that releases heat and light
  3. 6. a type of chemical change that produces heat and light
  4. 9. the leftover material after wood burns in a fire
  5. 10. chemical reactions cause this to happen to substances
  6. 11. a change in this can indicate a chemical change (another name for smell!)
  7. 13. sometimes released during a chemical reaction, like in fireworks
Down
  1. 1. this can be absorbed or released during a chemical reaction
  2. 2. a liquid that reacts with baking soda to produce bubbles
  3. 5. these can appear during a chemical reaction and indicate gas formation
  4. 7. the process in which substances are changed into different substances
  5. 8. a sign of a chemical change where the temperature increases
  6. 10. a change in this can indicate a chemical reaction
  7. 12. iron forms this reddish-brown substance when it reacts with oxygen
  8. 14. often formed in a chemical reaction, causing bubbling