Signs of a chemical reaction

123456789101112
Across
  1. 2. A sign of a chemical reaction when magnesium ribbon is burned.
  2. 4. the new substance(s) formed during a chemical reaction is called a _________________.
  3. 5. These are required at the start of a chemical reaction.
  4. 6. A sign of a chemical reaction observed watching fireworks
  5. 9. The word used in chemistry to describe the formation of a gas during a chemical reaction (fizzing).
  6. 11. Sometimes the sign of a chemical reaction that can escape into the air when formed
  7. 12. An everyday chemical reaction happening in the school canteen at lunch time
Down
  1. 1. A _____________ change is observed when toasting bread.
  2. 3. The place a chemical reaction is happening in your phone.
  3. 4. A chemical reaction that is done by plants and requires light energy from the sun.
  4. 7. The sign of a chemical reaction requiring olfactory receptors in your nose.
  5. 8. Chemical, light, sound, heat are examples of this that can be observed changing during chemical reaction.
  6. 10. An everyday chemical reaction that happens to iron when exposed to water and oxygen