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22 Cards in this Set
- Front
- Back
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boulder |
a very big rock |
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erosion |
the moving of rock or soil by wind, water, etc. |
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minerals |
nonliving materials that come from the Earth and are parts of rocks |
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natural resources |
a useful material that comes from the Earth |
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pollution |
the adding of harmful things to the land, air, or water |
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recycle |
to change something so it can be used again |
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reduce |
to use less of something |
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reuse |
to use something again |
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sand |
tiny pieces of rock |
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weathering |
the breaking apart and changing of rocks |
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conservation |
the process of respecting and using our resources in a responsible manner includes recycling, reducing, and reusing |
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reforestation |
when people replant a forest after a forest fire |
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renewable resources |
natural resources that can be replaced after being used |
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nonrenewable resources |
natural resources that are not easily replaced after being used or reproduced at a slower rate than are being used |
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wind |
moving air |
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rock cycle |
the process by which rocks are formed, broken apart, and reformed |
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metamorphic rocks |
rocks formed from heat and pressure |
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sedimentary rocks |
rocks formed from layers of sediment |
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sediment |
little pieces of rock formed by weathering or erosion |
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igneous rocks |
rocks formed from hot magma that cools |
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humus |
rich soil which contains decaying parts of living things |
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refuge |
a safe place for plants and animals to live |
