Our Environment

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Across
  1. 3. consisting of three atoms.
  2. 6. wavelength shorter than that of the violet end
  3. 8. the concentration of toxins
  4. 9. a small bag made of polythene
  5. 10. a biological community of interacting organisms
Down
  1. 1. make or become smaller or fewer in size, etc
  2. 2. an organic compound that does not occur naturally
  3. 4. a colourless, odourless flammable gas
  4. 5. organisms that can produce their own food
  5. 7. the destruction of something