Investigating Reactions Crossword

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Across
  1. 3. / uses sunlight
  2. 6. / a cleaning agent
  3. 8. / releases heat
Down
  1. 1. / usually in the form of heat and light
  2. 2. / product of photosynthesis
  3. 4. / you breathe it
  4. 5. / absorption of heat
  5. 7. / found in rain