Answer:
The density of lighter-colored igneous rock is usually less than that of darker-colored igneous rock
Explanation:
Igneous rocks are formed from crystallization of magma or lava. Igneous rocks formed from magma are intrusive rocks and form below the earth's surface while those formed from lava are extrusive and form above the earth's surface.
Igneous rocks can also be classified based on their chemical composition. Igneous rocks with a higher composition of felsic minerals (feldspar, quartz) are lighter in color in comparison to those rocks with a higher composition of mafic minerals (magnesium, iron). Felsic minerals tend to be of a lighter colour and have a specific gravity less than 3.0 while mafic minerals are darker in color and have a specific gravity greater than 3.0
While the color and density of igneous rocks do correlate with each other due to the properties of the minerals, the color and density are not directly related to each other.
Answer:
In general density of light-colored igneous rock is lower than dark-colored igneous rock
Explanation:
On the basis of composition Igneous rocks are classified into 2 main groups
Light-colored igneous rocks are made from the crystallization of felsic minerals such as feldspar, quartz, etc. Felsic minerals weigh lighter.
Dark-colored igneous rocks are composed of mafic minerals such as magnesium and iron. Mafic minerals tend to weigh heavier than felsic.
Thus we can conclude that in general density of light-colored igneous rock is lower than dark-colored ingneous rock.
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