Earth and Its Changing Features

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What is an estuary?

Back

An estuary is a coastal area where freshwater from rivers meets and mixes with saltwater from the ocean.

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What are fossils?

Back

Fossils are the remains or traces of ancient organisms, often preserved in rock.

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What is erosion?

Back

Erosion is the process by which soil and rock are removed from the Earth's surface by wind, water, or ice.

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How do sand dunes form?

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Sand dunes form from the accumulation of sand carried by the wind.

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What is a canyon?

Back

A canyon is a deep valley with steep sides, often formed by the erosion of a river over time.

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What is a volcano?

Back

A volcano is an opening in the Earth's crust that allows magma to escape to the surface.

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What is a rift valley?

Back

A rift valley is a lowland region that forms where tectonic plates move apart.

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What is a trench?

Back

A trench is a deep, narrow depression in the ocean floor, often formed by tectonic activity.

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What is a continental shelf?

Back

A continental shelf is the area of seabed around a large landmass where the sea is relatively shallow.

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What is the role of water in erosion?

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Water can erode rocks and soil by flowing over them, carrying away particles and shaping the landscape.