SCIENCE
EARTH SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Rock that forms on the surface of the earth.
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Molten rock once it has reached the surface of the earth.
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Rock that is formed by the cooling or lava or magma.
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Molten rock that does not reach the earths surface.
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Detailed explanation-1: -Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the Earth’s surface. These are the rocks that form at erupting volcanoes and oozing fissures.
Detailed explanation-2: -Igneous rocks are formed when hot, molten rock (magma) cools and solidifies. There are two main types of igneous rock, depending on where the magma cooled: Intrusive igneous rocks form when the magma comes from deep underground and is forced into the upper layers of the Earth’s crust, where it cools slowly.
Detailed explanation-3: -The two main categories of igneous rocks are extrusive and intrusive. Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet.
Detailed explanation-4: -Igneous rocks form from the cooling and hardening of molten magma in many different environments. These rocks are identified by their composition and texture.
Detailed explanation-5: -Igneous rock is formed by the solidification of molten magma, thrown up by the volcano. Common examples of igneous rocks are pumice stone and granite.