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13 Cards in this Set
- Front
- Back
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mineral |
a solid substance that occurs naturally in rocks or in the ground |
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rock |
a solid substance made of one or more minerals |
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igneous rock |
a type of rock that forms from melted rock that cools and hardens |
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sedimentary rock |
a type of rock that forms when layers of sediment are pressed together |
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metamorphic rock |
a type of rock that forms when heat or pressure change an existing rock |
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rock cycle |
the sequence of processes that change rocks from one type to another over long periods |
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weathering |
the breaking down of rocks on Earth's surface into smaller pieces |
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erosion |
the process of moving sediment from one place to another |
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humus |
the remains of decayed plants or animals in the soil |
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horizon |
a layer in the soil |
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bedrock |
the solid rock that forms earth's surface |
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sand |
the largest particles that make up soil |
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clay |
the smallest particles that make up soil |
