Our Environment

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Across
  1. 1. organisms that can make organic substances from inorganic molecules using radiant energy
  2. 5. an artificial ecosystem
  3. 6. bacteria and fungi
  4. 8. substances that persist in environment for long
  5. 9. progressive accumulation of toxic, non-biodegradable substances in higher trophic levels
  6. 10. an area where living organisms interact with abiotic components
Down
  1. 2. chemicals causing holes in ozone layer
  2. 3. a disease caused by UV rays of sun
  3. 4. substances that can be broken by biological processes
  4. 7. Each level of a food chain