What Are Rocks? Interactive Video

Which crust is denser, continental or oceanic?

• Neither is dense

• Both are equally dense

• Oceanic crust

• Continental crust

What is the primary component of the Earth's core?

• Silicon

• Magnesium

• Iron and nickel

• Aluminum

What does the presence of granite in the Himalayas indicate about its geological past?

• Historical volcanic activity

• Impact of meteorites

• Presence of large water bodies

• Glacial movements

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What type of rock is formed from magma that cools and solidifies beneath the Earth's surface?

• Sedimentary rock

• Intrusive igneous rock

• Metamorphic rock

• Extrusive igneous rock

Which type of rock is described as having a fine-grained texture?

• Granite

• Basalt

• Sandstone

• Gneiss

What geological process leads to the formation of sedimentary rocks?

• Melting of minerals

• Deposition and compaction of sediments

• Eruption of volcanoes

• Crystallization of magma

How does sedimentary rock like limestone form?

• From crystallized magma

• From metamorphic pressures

• From organic remains

• From volcanic ash

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What is the main characteristic of metamorphic rocks?

• They are formed from molten magma

• They are composed of unaltered sediments

• They are always porous and soft

• They are formed by recrystallization under pressure and temperature