CHEMISTRY

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Across
  1. 3. term used to describe oxisides organic materials (usually food)
  2. 4. most gas found in air composition
  3. 7. a substance that oxidises another substance during a redox reaction and it self reduced during the reaction (9 letter, 5 letters))
  4. 9. chemical reaction in which a substance reacts with oxygen (exothermic reactions)
  5. 10. element that has symbol C (6 letters)
Down
  1. 1. chemical reaction by which biological cells release the energy stored in glucose for use by the cell
  2. 2. fossil fuel formed from the remains of ancient marine plants/animals that can be used as fuel for transportations
  3. 5. reaction in which oxygen is added to an element/compound
  4. 6. reaction involving both reduction and oxidation
  5. 8. missing electron during redox reaction (4 letters)