Mechanical bell that functions by means of an electromagnet.
Practice the Hungarian alphabet and form words from the letters.
This animation demonstrates the most important relief features, surface waters and their relevant symbols.
Hotspots are areas of the Earth´s crust where magma often rises to the surface and causes volcanic activity.
The Panama Canal is an artificial waterway created to shorten shipping routes between the Pacific Ocean and the Atlantic Ocean.
The excellent road and aqueduct system covering the whole empire reflects well the development of the Roman civilization.
The device that transmits human voice as electrical signals was invented by Bell in 1876.
The seminomadic lifestyle of the Bedouin adapted to the climatic and environmental conditions of the desert.
The information gathered by the eye is misinterpreted by the brain.
Formula 1 is the highest class and most popular type of motor racing.
Skeletal muscles form the active part of the locomotor system: they move the bones they are attached to.
The large intestine is the last section of our digestive track.
One of the most modern means of transportation is the Maglev, capable of traveling at speeds of over 400 km/h (248.6 mph).
The American inventor presented his invention revolutionizing telecommunication at New York University in 1837.
Matter is made up by quarks and leptons, while interactions are carried by bosons.
Machines converting the energy of flowing or falling water into useful forms of power were already in use in the Middle Ages.
Dry land on the surface of Earth is divided into continents which are separated by oceans.
Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.
This animation demonstrates the development of the ax throughout archeological periods.
Water on Earth is in a continuous state of change. The water cycle includes processes such as evaporation, precipitation, melting and freezing.