Ferrous metallurgy (intermediate)

Raw iron is produced from iron ore in iron smelters.

English battleship (18th century)

English sailing ships were among the best ships in the 17th-19th centuries.

Vision correction

Concave and convex lenses are used for the correction of short-sightedness and far-sightedness.

Sewage treatment plant

Treated sewage water can be used in agriculture and industry.

Open-cast mine

As opposed to underground mines, in open-pit mines the layers covering coal are removed, coal is extracted on the surface.

Conquistador (16th century)

Spanish conquerors owed their success to their armour and firearms.

Tidal power station

Tidal power stations utilise the daily fluctuation of the water level for producing electricity.

Meteorological instruments

This animation demonstrates instruments used to examine atmospheric phenomena.

Medieval keep

Keeps were typical buildings in the Middle Ages, also built independently from castles.

Satellite types

Satellites orbiting the Earth can be used for civilian or military purposes.

Electricity supply network

The purpose of the electricity supply network is to provide electricity for consumers.

Space Shuttle

The Space Shuttle was a manned, reusable spacecraft operated by NASA.

Conformations of ethane

The staggered conformation of ethane is more stable than the eclipsed conformation.

Lead-acid battery

Electrochemical processes in a lead-acid battery produce electric current.

Planaria gonocephala

One of the most common types of flatworms.

The first days in school

Learn the concept of colours, numbers, letters and shapes while playing


This animation demonstrates several types of prisms, from general to regular.


This animation demonstrates the construction of motorcycles.

How does it work? - Combine harvester

Combine harvesters are machines that harvest and thresh grain crops.


A type of settlement that has central functions.

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