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Igneous Rocks

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    characteristics of igneous rocks
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  • the process where liquid magma or lava cools down to become solid rock
    solidification
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  • a scientist who studies rocks
    geologist
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  • an igneous rock that has formed from lava cooling down on the surface of the Earth
    extrusive igneous rock
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  • an igneous rock that has formed when magma cools down inside the Earth's crust
    intrusive igneous rock
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  • part of a rock made of different substances with a crystalline structure (quartz, feldspar)
    mineral
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  • the particular shaped structure of a mineral
    crystal
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  • the adjective for crystal
    crystalline
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  • the expression that means we can see something with our eyes without the help of a magnifying glass or microscope
    naked eye
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  • cooling time of intrusive igneous rocks
    thousands of years
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  • cooling time of extrusive igneous rocks
    seconds to months
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  • Granite is an example of _________ _________ rock.
    intrusive igneous
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  • Basalt is an example of _________ _________ rock.
    extrusive igneous
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  • molten rock that is underground
    magma
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  • molten rock that breaks through the Earth's surface
    lava
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  • Intrusive igneous rocks have ___________ crystalline texture.
    coarse
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  • Extrusive igneous rocks have ___________ crystalline texture.
    fine
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