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The Solar System; planetary orbits

The orbits of the 8 planets in our Solar System are elliptical.

Change of seasons (intermediate)

Due to the Earth´s tilted axis, the angle of the Sun's rays at given latitudes continuously changes during the year.

ISS

The International Space Station is a habitable satellite built with the cooperation of 16 countries.

Ozone layer

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

Anglerfish

This bizarre-looking fish uses its bioluminescent lure to catch its prey. The animation explains how it works.

Continents and oceans

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

Prenatal development

This animation demonstrates the development of the human embryo and foetus.

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.

Viking settlement (10th century)

Typical settlements of the Norsemen were not only established in Scandinavia, they appeared on distant areas as well.

Theatre of Dionysus (Athens, 4th century BC)

The theatre that has a distinctive shape and excellent acoustics was situated at the side of the Acropolis in Athens.

Tenochtitlan (15th century)

The magnificent capital of the Aztec Empire astonished even the Spanish Conquistadors.

Soviet labour camp (1930s)

Soviet labour camps (Gulags) were located far from inhabited areas.

Kaaba (Makkah)

Located in the Grand Mosque of Makkah, the Kaaba shrine is the most sacred site of Islam.

Solar eclipse

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

Taj Mahal (Agra, 17th century)

The centre of the Indian mausoleum complex is a white marble tomb built by Shah Jahan for his beloved wife.

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