OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Liquid rock rises from inside Earth and cools.
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Chemicals mix in water bodies and settle to form new rock.
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Debris accumulates on the ground and compresses to form rock.
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The properties of existing rock are changed by heat and pressure.
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Detailed explanation-1: -Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.
Detailed explanation-2: -The formation of metamorphic rock can involve both physical and chemical changes to the existing rock. Heat and pressure can cause ions to move in or out of a mineral. This is a chemical change that creates a different mineral. The new minerals that form during metamorphism are more stable in the new environment.
Detailed explanation-3: -Answer: The formation of metamorphic rocks is initiated when the rocks such as igneous and sedimentary rocks are subjected to high pressure, heat, and hot fluids.
Detailed explanation-4: -Metamorphism occurs because some minerals are stable only under certain conditions of pressure and temperature. When pressure and temperature change, chemical reactions occur to cause the minerals in the rock to change to an assemblage that is stable at the new pressure and temperature conditions.