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Science Chapter 6
Saving Earth's resources
Question | Answer |
---|---|
Mineral | a natural nonliving substance that makes up rock |
Igneous Rock | form from melted rock |
Sedimentary Rock | form from sediments that are cemented or pressed together |
Relative Age | the age of one thing compared to another |
Metamorphic Rock | rocks formed from other rocks by extreme heat and pressure |
Rock Cycle | shows how rocks change from one form to another |
Resource | materials from Earth that have useful properties |
Humus | a nonliving plant or animal matter |
Horizon | soil form in layers called... |
Soil Profile | shows horizons |
Topsoil | another name for the A horizon |
Subsoil | another name for the B horizon |
Pore Spaces | the spaces between particles of soil |
Porous | materials with pore spaces |
Permeability | describes how fast water passes through a porous material |
Fossil | evidence of an organism that lived long ago |
Amber | a hard, smooth material |
Mold | a hollow form with a certain shape |
Cast | a fossil that is formed or shaped in a mold |
Imprint | a mark made by pressing |
Fossil Fuel | an energy source that formed millions of years ago |
Nonrenewable Resource | a useful material that cannot be replaced easily |
Renewable Resource | a useful material that is replaced quickly in nature |