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6 Cards in this Set

  • Front
  • Back
drought
a long period of dry weather
endangered organism
a kind of living thing of which very few exist and that someday might not be found on the earth
extinct organism
a kind of living thing that is no longer found on the earth
fossil
the hardened parts or marks left by an animal or plant that lived long ago
pollution
anything harmful added to the air, water, or land
recycle
to change something so it can be used again