Geology Basics

Front

What are the layers of the Earth?

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The Earth is composed of several layers: the crust, mantle, outer core, and inner core.

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What is the rock cycle?

Back

The rock cycle is a continuous process by which rocks are created, changed from one form to another, destroyed, and then formed again.

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What are sedimentary rocks?

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Sedimentary rocks are types of rocks that are formed by the accumulation or deposition of mineral or organic particles at the Earth's surface, followed by cementation.

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What is lava?

Back

Lava is molten rock expelled by a volcano during an eruption. It is above the Earth's surface.

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What is magma?

Back

Magma is molten rock located beneath the surface of the Earth.

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What is metamorphic rock?

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Metamorphic rocks are rocks that have been changed by heat, pressure, or chemical processes, usually while buried deep below Earth's surface.

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What is igneous rock?

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Igneous rocks are formed through the cooling and solidification of magma or lava.

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What is weathering?

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Weathering is the process of breaking down rocks, soil, and minerals through contact with the Earth's atmosphere, water, and biological organisms.

Front

What is erosion?

Back

Erosion is the process by which soil and rock particles are worn away and moved elsewhere by wind, water, or ice.

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What is deposition?

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Deposition is the geological process in which sediments, soil, and rocks are added to a landform or landmass.