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6th Grade Science WB Pg. 19

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  • a useful material that cannot be replaced easily
    nonrenewable resource
  • a hollow form with a certain shape
    cast
  • a fossil that is formed or shaped in a mold
    mold
  • hardened sap; hard and smooth material
    amber
  • a mark made by pressing
    imprint
  • an energy source that formed millions of years ago
    fossil fuel
  • a useful material that is replaced quickly in nature
    renewable resource
  • evidence of an organism that lived long ago
    fossil
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