Biodiversity Crossword!

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Across
  1. 3. a system of interlocking food chains
  2. 7. an organism that takes energy from the sun to make its own food
  3. 8. relating to water
  4. 9. the cycle of matter being transfered
  5. 12. makes up all matter
  6. 13. where a producer gains energy
Down
  1. 1. of the Earth
  2. 2. the number of different plants and animals in an ecosystem
  3. 4. where an organism is placed on a food chain
  4. 5. needed for an organism to do work or complete a task
  5. 6. an organism that eats other organisms for energy
  6. 10. turning old matter into something new
  7. 11. the smallest unit of life