The relatively light crystal rock forming continents with density about 2.7 g/cm^3 is called?

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Multiple Choice

The relatively light crystal rock forming continents with density about 2.7 g/cm^3 is called?

Explanation:
The main idea is that continents are built from a lighter, silica-rich crystalline rock called granite. Granite is a coarse-grained igneous rock formed from slow cooling underground, with minerals like quartz and feldspar that give it a light color and a density around 2.7 g/cm^3. This relatively low density lets continental crust float higher on the mantle compared with the denser oceanic crust, which is primarily basalt and has a density closer to 3.0 g/cm^3. Rhyolite is also a felsic rock but forms from volcanic eruptions and usually has finer crystals; basalt is denser and forms the ocean floor; gneiss is a metamorphic rock that can be part of continents but isn’t the basic rock that makes up the continents. So the rock described is granite.

The main idea is that continents are built from a lighter, silica-rich crystalline rock called granite. Granite is a coarse-grained igneous rock formed from slow cooling underground, with minerals like quartz and feldspar that give it a light color and a density around 2.7 g/cm^3. This relatively low density lets continental crust float higher on the mantle compared with the denser oceanic crust, which is primarily basalt and has a density closer to 3.0 g/cm^3. Rhyolite is also a felsic rock but forms from volcanic eruptions and usually has finer crystals; basalt is denser and forms the ocean floor; gneiss is a metamorphic rock that can be part of continents but isn’t the basic rock that makes up the continents. So the rock described is granite.

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