Deep-sea hydrothermal vents

A hydrothermal vent is a fissure in the planet's surface through which geothermally heated water erupts.

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The rock cycle

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The Gregorian calendar

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Types of soil (soil profiles)

This animation demonstrates different types of soil.

Karstification

The dissolution of limestone results in the development of karst formations.

How do seas shape the Earth's surface?

Seawater, as an external force, plays an important role in shaping coastlines.

El Niño

A periodic climate pattern that occurs across the tropical Pacific Ocean every five years.

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