How can you compare and contrast the 3 different types of rocks?

Answer 1

Igneous Rocks for from either magma or cooling lava.

Sedimentary rocks form from layers of sediments.

Metamorphic rocks can be any rock that has changed under great pressure and/or heat.

Answer 2

The three rock types are sedimentary, igneous, and metamorphic. At one time, early in Earth's history, all rocks were igneous, having solidified from molten rock. From a textural point of view the differences are as follows: Sedimentary: grains of similar or differing sizes showing variable sphericity and roundness either grain or matrix supported. Igneous: crystalline grains interlocking but not showing any preferred orientation. Metamorphic: crystalline grains (for the most part except low grade metamorphic rocks) interlocking, showing preferred orientation (alignment) and associated metamorphic minerals such as garnet, kyanite and sillimanite for example. Formation:Igneous rocks, which are formed from magma cooling underground, or lava above ground are formed from previous igneous, metamorphic, or sedimentary rocks which have become melted, usually as a result of plate collision and subduction. When these igneous rocks are exposed to weathering and erosion, they break down into smaller particles that are transported by wind and water to a place of deposition, where they can form into sedimentaryrock strata, through a process of lithification, where excess water is squeezed out by overburden pressures and the particles are cemented together by various minerals precipitating out of solution. Igneous and metamorphic rocks can both be turned into sedimentary rocks in this way. Igneous and sedimentary rocks can also be changed by heat and/or pressure into metamorphic rocks, by transforming their existing mineral structures into new minerals or realigning the existing minerals. There are different degrees of metamorphism, so even an existing metamorphic rock can become a different metamorphic rock.

Answer 3

They each are made in a different way.

Igneous rock is made from liquid molten material that has cooled.

Sedimentary rock is made sediments/minerals piling up on each other.

Metamorphic rock is made by the extreme heat and pressure inside the earth.

Answer 4

In comparing,each of these rocks,if we take the rock cycle into consideration we have the solidfication of molten materias that form the igneous rocks and after weathering and erosion takes place these materials settle forming the sedimentary rocks due to heat and pressure we metamorphic rocks forming.there after,melting takes place,forming magma.after this crystallization takes place forming igneous rocks again.

Answer 5

Each of the rocks form in a different way.