Igneous rocks

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If a body of magma becomes more felsic, its viscosity will ____________.

increase

Igneous rocks ____________.

All answers are correct

In Bowen reaction series, the first mineral to crystallize from a mafic melt is ____________.

Olivine

As compared to coarse-grained igneous rocks, all fine-grained igneous rocks ____________

cool and solidify more quickly

All other factors being equal, intrusive rocks that form deep within Earth ____________ than intrusive rocks that cool near the surface.

cool more slowly

When magma crystallizes, ____________ are formed.

intrusive igneous rocks

The difference between lava and magma is that ____________

magma is found beneath the Earth's surface, whereas lava has reached the surface

When rock is partially melted, the chemistry of the melt is ____________.

more felsic than the original chemistry of the rock that was partially melted

An igneous rock with a mixed texture of coarse grains (phenocrysts) surrounded by fine crystals (groundmass) is termed ____________.

porphyritic

Coarse-grained granite is most similar in mineral composition to fine-grained ____________.

rhyolite


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