The rocks were originally formed from the molten Magma, which erupted from the interior of the earth. Powerful Earth movements have helped some of the rocks to rise to the top surface.

What is the Difference Between Magma and Lava?

When the molten rock is below the Earth’s surface, it is called Magma. While on the other hand, when the molten rock is above the Earth’s surface, it is called Lava.

Lava from volcano
Lava from volcano

Name the Three Types in Which the Rocks Are Grouped

The three types in which rocks are grouped are Igneous rocks, Sedimentary rocks and Metamorphic rocks.

How Are the Igneous Rocks Formed?

Igneous rocks are formed when molten rock cools and becomes solid. Granite and Basalt are examples of it.

How Are the Sedimentary Rocks Formed?

The rocks, which are formed from the deposition of sediments, are called sedimentary rocks

Sedimentary rocks
Sedimentary rocks

How Are the Sedimentary Rocks Helpful for the Scientists?

As sedimentary rocks preserve a record of the environments that existed when they were formed, they are very helpful for the scientists. By looking at sedimentary rocks of different ages, scientists can figure our how climate and environments have a changed through Earth’s history.

Sedimentary rocks make up about three – quarters of the rocks on the Earth’s surface.

How Are Metamorphic Rocks Formed?

Due to intense heat and pressure from the above layers, igneous and sedimentaty rocks change into metamorphic rocks. Slate and marbles are examples of it.

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