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Geyser

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

Nitrogen cycle

Atmospherical nitrogen is bound by bacteria and used by living organisms in the form of various compounds.

Aeolian landforms on coasts and steppes

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

Seafloor map

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

The phosphorus cycle

The phosphorus cycle describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.

Oxygen cycle

The oxygen cycle describes the movement of oxygen within its three main reservoirs.

Glacier (intermediate)

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

Geothermal power station

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

Mid-latitude cyclone and anticyclone

Cyclones are large areas of circulating air with clouds and precipitation being formed in its centre.

Warm front, cold front

Cold and warm fronts are formed where bodies of cold and warm air meet.

El Niño

A periodic climate pattern that occurs across the tropical Pacific Ocean every five years.

Tropical cyclones

Cyclones are large air masses with winds spiralling inwards around a low-pressure centre, and carry clouds and precipitation.

Local winds

The most important types of local winds are the sea-land breeze, the mountain-valley breeze as well as the downslope winds.

یخچال طبیعی (پایه)

یخچال طبیعی یک یخ بزرگ است که از برف تشکیل می شود و در حرکت آهسته، و مداوم است.

Folding (intermediate)

Lateral compressive forces cause rocks to form folds. This is how fold mountains are formed.

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