Ozone layer

The ozone layer filters the Sun´s harmful UV radiation, therefore it is indispensable for life on Earth.

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Wind at the beach

Sea and land breeze form because of the differing warming of land and sea.

Plate tectonics

Plate tectonics is a theory dealing with the movement of plates.

Folding (basic)

Lateral compressive forces cause rocks to form folds. This is how fold mountains are formed.

Tectonic plates

Tectonic plates can move in relation to each other.

Tropical cyclones

Cyclones are large areas of swirling air with clouds and precipitation being formed inside.

Why is seawater salty?

Water covers about 71% of the Earth’s surface. But why are there two types of water on Earth,...

Waves

Waves play an important role in forming the coast.

The desert

One third of the continents is covered with desert. Today, desertification is a growing problem.

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