C7 AQA - Revision

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Across
  1. 3. / A sign that a chemical reaction is happening is ________
  2. 8. / A chemical reaction that releases heat energy
  3. 9. / When bonds are broken, energy is...
  4. 10. / Endothermic reactions are used in first aid in _______ packs
Down
  1. 1. / The energy needed to start a reaction is called the __________ energy
  2. 2. / You can tell a reaction is exothermic because the temperature of the surroundings _______
  3. 4. / A chemical reaction that absorbs heat energy
  4. 5. / When bonds are made, energy is...
  5. 6. / Reusable hand warmers use exothermic reactions and are ________ than single use ones
  6. 7. / You can tell a reaction is endothermic because the temperature of the surroundings _______