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Ch. 7 The Rock Cycle

Science Chapter 7 (The Rock Cycle) Definitions

TermDefinition
Mineral Solid substance that occurs naturally in rocks or in the ground
Rock Solid substance made of one or more minerals
Igneous Rock Type of rock that forms from melted rock that cools and hardens
Sedimentary Rock Type of rock that forms when layers of sediment are pressed together
Metamorphic Rock Type of rock that forms when heat or pressure change an existing rock
Rock Cycle Sequence of processes that change rocks from one type to another over long periods
Weathering Breaking down of rocks on Earth's surface into smaller pieces
Erosion Process of moving sediment from one place to another
Humus The remains of decayed plants or animals in the soil
Horizon Layer in the soil
Bedrock Solid rock that forms Earth's surface
Sand Largest particles that make up soil
Clay Smallest particles that make up soil
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