Revision

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Across
  1. 6. The build up of toxic chemicals inside organisms in a food chain.
  2. 7. Chemical reaction where glucose reacts with oxygen to release energy.
  3. 8. Chemical reaction used by microorganisms (to make bread.
Down
  1. 1. The process plants use to make their own food.
  2. 2. The number of plants or animals of the same type that live in the same area.
  3. 3. Chemical reaction which releases energy and takes place without oxygen.
  4. 4. The way in which living organisms depend on each other.
  5. 5. Molecule which produces energy, we get it from digested food.