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