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7 Cards in this Set
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- Back
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Metamorphic Rocks |
When already existing rocks are buried deep in the Earth, heat, pressure, and chemical reactions cause them to change into different rocks with different textures and structures. Formed by extreme heat and pressure. Examples – slate, marble, quartzite, schist |
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Sedimentary Rocks |
These rocks form on Earth’s surface from sediment (rock and mineral fragments) without heat or pressure.Erosion and deposition play roles in making these rocks. Other rock weathers from ice, wind, & water and then sediment is combined together.The layers in sedimentary rocks are called strata. Formed by sediments *compacting* |
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Igneous rocks |
Extrusive – Forms quickly from cooled lava outside the earth’s crust. *Fine grained and few or no crystals.* Example – basalt, rhyolite, obsidian, and pumice. Intrusive – Forms slowly from magma beneath the earths surface. *Coarse grained with crystals.* Example – granite and gabbro |
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Rock |
A solid mass of mineral that occurs naturally on Earth. |
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Mineral |
Is inorganic (non-living),Occurs naturally, not man-made, Is a Solid, Has a crystalline structure, is made of crystals. |
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How do scientists classify rocks? |
Based on their composition and texture. |
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The Rock Cycle |
The process by which rocks are changed by heat, pressure, erosion, weathering, or cooling to form a new rock. |
