The White House (Washington, DC, 1800)

One of the best known buildings in the world, this is the residence and office of the President of the United States.

Deep-sea hydrothermal vents

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

Mitosis

Mitosis is the process by which a eukaryotic cell divides into two cells and the number of chromosomes remains unchanged.

Hungarian alphabet game

Practice the Hungarian alphabet and form words from the letters.

The water cycle (intermediate)

Water on Earth is in a continuous state of change. The water cycle includes processes such as evaporation, precipitation, melting and freezing.

Faulting (intermediate)

Vertical forces can break up layers of rock into fault blocks, which then move vertically along the fracture planes.

Tectonic plates

Tectonic plates can move in relation to each other.

Folding (advanced)

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

Tide

The rise and drop of sea levels caused by the gravitational force of the Moon.

Carbon cycle

Carbon is bound in organic substances during photosynthesis, while during breathing, it is released into the atmosphere.

Continents and oceans

Dry land on the surface of Earth is divided into continents which are separated by oceans.

Electric bell

Mechanical bell that functions by means of an electromagnet.

Solar eclipse

When the Sun, Earth, and the Moon are arranged in a straight line, the Moon can partially or completely obscure the Sun.

Terms of physical geography

This animation demonstrates the most important relief features, surface waters and their relevant symbols.

Lunar eclipse

Lunar eclipses occur when the Moon passes through the shadow cone of Earth

Earth

The Earth is a rocky planet with a solid crust and oxygen in its atmosphere.

Elementary particles

Matter is made up by quarks and leptons, while interactions are carried by bosons.

Hydroelectric power plant (Hoover Dam, USA)

The huge dam built on the Colorado river in the US was named after a former American President.

Dynamo (intermediate)

A dynamo converts mechanical energy into direct current.

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