Classifying Rocks: Question Preview (ID: 16626)


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Igneous rock that cools very quickly when it forms may have a texture that is
a) smooth and shiny with no visible grains. b) multicolored and banded c) coarse grained d) made up of jagged grains
When all the grains in a rock are large and easy to see, the rock is described as
a) extrusive b) fine grained c) coarse grained d) nonbanded
To describe a rock's texture, geologists determine
a) the color and density of a rock. b) how the rock formed. c) the size, shape, and pattern of the rock's grains. d) how many minerals the rock contains.
Generally, a rock is made up of
a) large crystals. b) a mixture of minerals and other materials. c) small crystals. d) a compound of several elements.
The texture of slate is said to be ______ because it mineral particles can be seen only with a microscope.
a) jagged b) banded c) coarse grained d) fine grained
Particles of minerals or other rocks are called
a) grains b) crystals c) jagged d) feldspar
_______________ tells the minerals that make up a rock.
a) Texture b) Grain pattern c) Grain size d) Composition
A rock formed deep underground by heat and pressure or chemical reactions is called a(n) _______ rocks
a) sedimentary b) igneous c) metamorphic d) coarse grained
A type of rock formed by the cooling of magma or lava is called a(n) _______ rock.
a) sedimentary b) igneous c) metamorphic d) banded
A type of rock that is formed in layers by the weathering or erosion of rock is called a(n) ___________ rock.
a) sedimentary b) igneous c) metamorphic d) fine grained
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