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Machines converting the energy of wind into useful forms of power were already in use in the Middle Ages.

Mājturība un tehnoloģija


vējdzirnavas, graudu slīpēšana, kokzāģētava, dzirnakmens, Vēja enerģija, bremzes ritenis, asmeni, kinētiskā enerģija, mehāniskais darbs, atjaunojamā enerģija, tehnika

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Horse mill

Machines powered by animals were mainly used in mills, for grinding grains.


Machines converting the energy of flowing or falling water into useful forms of power were already in use in the Middle Ages.


Cereals are species of grasses cultivated for their edible grains.

Threshing machine (19th century)

Threshing machines are used for separating grains from straw.

Aeolian landforms in deserts

Wind, as an external force, plays an important role in shaping deserts.

Aeolian landforms on coasts and steppes

Wind, as an external force, plays an important role in shaping coastal areas and steppes.

Geothermal power station

Geothermal power stations convert energy of hot, high-pressure water found in deeper layers of the Earth into electricity.


A geyser is a spring characterised by intermittent discharge of water and steam.

Granary in the Indus Valley

Ancient Indians built huge, naturally ventilated storehouses.

How does it work? - Combine harvester

Combine harvesters are machines that harvest and thresh grain crops.

Land reclamation in the Netherlands, 17th century

Inhabitants of the northern part of the Netherlands have successfully fought the sea since the Middle Ages.

Meteorological instruments (basic)

This animation demonstrates instruments used to examine atmospheric phenomena.

Solar power station

Solar power stations convert solar energy into electricity.

Types of gears

Two meshing gears transmit torque during their rotational motion.

Wind power station

Wind power stations convert the kinetic energy of the wind into electricity.

How does it work? - Impulse steam turbine

This animation demonstrates the structure and operation of impulse turbines.

Precision agriculture

This animation demonstrates the use of modern technology in agriculture.

Biogas power plant

Biogas can be produced from organic material (manure, plant waste, organic waste) using bacteria. Biogas is a mixture of methane and carbon dioxide; burning...

Hero’s aeolipile

Hero of Alexandria is the inventor of the first steam engine, although he regarded it as an entertaining toy.

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