Which of the three rock types is formed from the cooling of magma or lava?

Study for the Leaving Certificate Geography Test. Gain insight with scenarios and multiple choice questions. Equip yourself with exam-ready knowledge!

Igneous rock is formed from the cooling and solidification of magma or lava. When magma cools beneath the Earth's surface, it forms intrusive igneous rocks, such as granite. Conversely, when lava cools on the surface following a volcanic eruption, it results in extrusive igneous rocks, such as basalt. This process of cooling allows the minerals within the molten material to crystallize and form solid rock.

In the context of the other choices, sedimentary rock is created from the accumulation and compaction of sediments, often derived from the erosion of existing rocks, while metamorphic rock originates from existing rocks that undergo transformation due to heat, pressure, or chemically active fluids without melting. Granular rock isn't a classification of rock types in geology; therefore, the focus on igneous rock as the product of molten material cooling makes it the correct selection.

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