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Geothermal power stations convert energy of hot, high-pressure water found in deeper layers of the Earth into electricity.
Biogas can be produced from organic material (manure, plant waste, organic waste) using bacteria. Biogas is a mixture of methane and carbon dioxide; burning...
An earthquake is one of the most devastating natural phenomena.
Lateral compressive forces cause rocks to form folds. This is how fold mountains are formed.
Stratovolcanoes consist of layers of volcanic ash, debris and lava.
The last Ice Age ended about 13 thousand years ago.
A glacier is a large body of ice that forms from snow, and is in constant, slow motion.
This animation demonstrates the structure and operation of hair dryers.
The huge dam built on the Colorado river in the U.S. was named after a former American President.
Solar power stations convert solar energy into electricity.
Water on Earth is in a continuous state of change. The water cycle includes processes such as evaporation, precipitation, melting and freezing.
Groundwater and aquifers are types of underground waters.
This animation demonstrates different types of volcanic eruptions.
Machines converting the energy of wind into useful forms of power were already in use in the Middle Ages.
Hotspots are areas of the Earth´s crust where magma often rises to the surface and causes volcanic activity.
The relationship between the pressure, volume and temperature of ideal gases is described by the gas laws.
Karst formations include dolines and dripstones.