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How can we group chemical reactions?

The experiments in this lesson will introduce you to the various types of chemical reactions.

Let's measure time!

This lesson presents timekeeping devices and the types and units of time measurement.

A Journey to the Centre of Earth

This lesson presents the internal structure of Earth, the geospheres and their general...

Become a forensic anthropologist

Find out what types of bones there are and what anthropologists do!

Do lichens damage trees?

In this lesson you will familiarise yourselves with special organisms, that is lichens.

Let's get to know the faces of forests!

In this lesson you will find out where deciduous forests are located on the Earth and...

User manual

A guide about the meaning of icons found in digital lessons and the possibilities of...

Space adventurers: Space travel

In this lesson you will learn about the presence of humans in space in the past, present...

The human urinary system

This lesson presents the structure and functioning of the human urinary system.

Why are there deserts and ice sheets on Earth?

This lesson explains the reasons and consequences of the formation of climatic zones.

Cardiovascular diseases Part 1

This lesson presents some types of cardiovascular diseases, including their diagnoses and...

What material are objects made of?

Learn about the properties of materials that objects around us are made of.

The wave phenomena of sound

When does echo form? Why does sound spread easier at night? What is the secret to a good...

The anatomy of the heart (intermediate)

This lesson introduces the position and anatomy of the heart, as well as the blood flow...

Living fossils

Learn about animal species that emerged in the distant past and stayed mostly unchanged

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