Environment and energy flow revision

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Across
  1. 2. The dry mass of living things
  2. 5. More than one food chain linked together
  3. 6. Animal that only eats other animals
  4. 7. When plants in a river overgrow and die,and bacteria and fungi decay their remains using up oxygen
  5. 12. When bacteria and fungi break down dead organisms
  6. 13. Animal that only eats plants
Down
  1. 1. The organism at the beginning of a food chain, gets energy from the sun
  2. 3. Animal that spreads bovine tuberculosis to cattle
  3. 4. A way of showing feeding relationships and energy flow in an ecosystem (2 words)
  4. 5. Added to fields to help plants grow
  5. 8. Animal at the top of the food chain
  6. 9. Chemical sprayed on crops to kill pests
  7. 10. A type of organism that causes decay
  8. 11. Can be used to show amounts of biomass or numbers of organisms at each level of a food chain