Euglena viridis

Unicellular eukaryotes living in freshwaters, capable of feeding autotrophically and heterotrophically.

Tectonic plates

Tectonic plates can move in relation to each other.

Nuclear power plant

Nuclear power plants convert the energy released during nuclear fission into electric power.

Carbon cycle

Carbon is bound in organic substances during photosynthesis, while during breathing, it is released into the atmosphere.

Solar eclipse

When the Sun, Earth, and the Moon are arranged in a straight line, the Moon can partially or completely obscure the Sun.

Tide

The rise and drop of sea levels caused by the gravitational force of the Moon.

Folding (advanced)

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

The heart

The heart is the central pump of the cardiovascular system beating several billion times over our lifetime.

Lunar eclipse

Lunar eclipses occur when the Moon passes through the shadow cone of Earth

Earth

The Earth is a rocky planet with a solid crust and oxygen in its atmosphere.

The water cycle (intermediate)

Water on Earth is in a continuous state of change. The water cycle includes processes such as evaporation, precipitation, melting and freezing.

Layers of the skin; cutaneous senses

The skin is the soft outer covering of our body, its three layers are the epidermis, the dermis and the hypodermis.

Nervous system

The central nervous system consists of the brain and the spinal cord, the peripheral nervous system consists of nerves and ganglia.

Faulting (intermediate)

Vertical forces can break up layers of rock into fault blocks, which then move vertically along the fracture planes.

Hydroelectric power plant (Hoover Dam, USA)

The huge dam built on the Colorado river in the US was named after a former American President.

Voice production

When producing sound, the vocal cords are vibrated by the air flowing out of the lung.

Diesel engine

The German engineer Rudolf Diesel patented the diesel engine in 1893.

Anatomy of the small intestine

The longest part of the digestive system, where most of the digestion and absorption takes place.

European crayfish

A type of large freshwater crayfish widespread in Europe.

European garden spider

This animation demonstrates the anatomy of spiders through the example of a common European species.

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