Answer
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Hint: Rocks are combinations of homogeneous substances called minerals. Minerals occur in the form of igneous, metamorphic and sedimentary rocks.
Complete answer: The difference is given below:
Igneous rocks are of two types: Intrusive Igneous rocks are formed when magma hardens beneath Earth’s surface whereas extrusive igneous rocks are formed when lava hardens.
Metamorphic rocks are formed when existing rocks are changed by heat and pressure and the once were igneous and sedimentary then changed into metamorphic.
Note: It is important to understand that Igneous, sedimentary and metamorphic rocks are formed through the cycle of physical changes such as melting, cooling, eroding, compacting, or deforming.
Complete answer: The difference is given below:
Igneous and Metamorphic rocks | Sedimentary rocks |
They occur in cracks, crevices, faults or joints. | They occur in beds or layers. |
They are formed when minerals in molten and gaseous forms are forced upward through cavities towards the earth’s surface. | They are formed as a result of deposition, accumulation and concentration in horizontal strata. |
Major metallic minerals made by igneous rocks are tin, copper, zinc and lead etc. | Coal and iron ore concentrated as a result of great heat and pressure. |
Basalt, Obsidian, Granite are examples of Igneous rocks.Schist, gneiss, quartzite are examples of metamorphic rocks. | Sandstone, Limestone and Shale are the examples of Sedimentary rocks. |
Igneous rocks are of two types: Intrusive Igneous rocks are formed when magma hardens beneath Earth’s surface whereas extrusive igneous rocks are formed when lava hardens.
Metamorphic rocks are formed when existing rocks are changed by heat and pressure and the once were igneous and sedimentary then changed into metamorphic.
Note: It is important to understand that Igneous, sedimentary and metamorphic rocks are formed through the cycle of physical changes such as melting, cooling, eroding, compacting, or deforming.
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