Rocks and The Rock Cycle
Presentation
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Science
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9th - 12th Grade
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Practice Problem
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Medium
Standards-aligned
Gina Treat
Used 159+ times
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7 Slides • 5 Questions
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Rocks and The Rock Cycle
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The Rock Cycle
The Rock Cycle is a group of changes. Igneous rock can change into sedimentary rock or into metamorphic rock. Sedimentary rock can change into metamorphic rock or into igneous rock. Metamorphic rock can change into igneous or sedimentary rock.
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Igneous Rocks
Magma is formed by the melting of rocks
Igneous rocks are formed by the cooling of magma
Volcanic glass, like obsidian, formed from a lava that cooled so quickly crystals did not form; glassy texture
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Igneous Rocks
Volcanic or extrusive rock, like basalt, formed from a lava that cooled on Earth's surface, allowing small crystals to form; fine-grained texture
Plutonic or intrusive rock, like granite, formed from a magma that cooled below Earth's surface, allowing large crystals to form; coarse-grained texture
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Sedimentary Rocks
Sediments are formed by the weathering and erosion of rocks
Clastic Sedimentary rocks, like sandstone, are formed by the compaction and cementation of sediments ranging in size, from smallest to largest: clay, silt, sand, pebbles, cobbles, and boulders
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Sedimentary Rocks
Chemical sedimentary rocks, like rock salt, are made when water evaporates or when the mineral falls out of a water solution
Organic sedimentary rocks, like coal, are made from the remains of plants and animals.
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Metamorphic Rocks
Metamorphic rocks are created when any rock experiences high heat and pressure
Foliated metamorphic rocks, like gneiss, have visible layering or bands of minerals
Nonfoliated metamorphic rocks, like quartzite, have NO visible layering or bands of minerals and instead are more crystalline
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Rocks and The Rock Cycle
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