Glacier (intermediate)

A glacier is a large body of ice that forms from snow, and is in constant, slow motion.

Seafloor map

The boundaries of tectonic plates can be seen on the seafloor.

Karst region (intermediate)

Karst formations include dolines and dripstones.

Climate zones

The Earth is divided into geographical and climatic zones, which result in the zonation of vegetation.

DC motor

DC motors consist of a permanent magnet and a coil within the magnet, with electric current flowing in it.

Leaning Tower of Pisa (14th century)

The medieval bell tower of the Cathedral of Pisa is the most famous leaning tower of the world.

Cube

This animation demonstrates the components (vertices, edges, diagonals and faces) of the cube, one of the Platonic solids.

Cylindrical solids

This animation demonstrates various types of cylindrical solids as well as their lateral surfaces.

Sphere

A sphere is the set of points which are all within the same distance from a given point in space.

Thyroid gland

An important endocrine gland producing hormones that affect metabolism and the calcium balance of the body.

Road transportation, trucks

Heavy trucks play an important role in transportation.

Reaction of hydrogen with oxygen

Knallgas is the mixture of hydrogen and oxygen. It will explode when ignited.

Muscles of the upper arm

The arms are moved by flexor and extensor muscles.

The skull and the spine

The two main parts of the central nervous system, the brain and the spinal cord are protected by the skull and the spinal column.

Mars

Possible traces of water and life are sought on Mars.

Jupiter

Jupiter is the largest planet of the Solar System, it has two and a half times the mass of all the other planets combined.

Phases of the Moon

During its orbit around the Earth, the visibility of the Moon's illuminated part constantly changes.

Intersection

Entertaining and spectacular animation to practice orientation in space.

Mercury

Mercury is innermost and smallest planet of the Solar System.

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