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Some processes cool the environment, while others heat it.

Learn what differentiates donkeys from horses.

What challenges does the Sahel region face?

An element capable of self-ignition that plays an important role in the stiffness of our bones and in biological inheritance.

It is important to know what dissolves in what.

The age of Earth was debated for centuries by numerous outstanding scientists from different fields.

A strong acid that decomposes when exposed to light and heat.

For thousands of years, scientists have wondered if the events around us are determined by causality, randomness or supernatural powers.

With this lesson, you can get to know yourself and your classmates better.

In this lesson, you will learn about the mole, a useful predatory mammal that is often considered a pest.

Carbon atoms can form various types of bonds with other carbon atoms.

Silicon is the second most abundant element on Earth. Its compounds are found in various minerals.

Learn about the process of diffusion and osmosis.

Learn about the fascinating history of Issyk-Kul lake.

While most metals are grey, they are not at all unremarkable.

Corrosion is the greatest enemy of metals.

Scientists have debated the nature of heat for centuries. Learn about this fascinating scientific debate.

This project demonstrates the reactions of several metals with acids.

In this lesson, you can learn about the characteristics of sodium and potassium.

Learn about the region of the Great Lakes in North America.

Sundials are seemingly simple time-measuring instruments, but it is not an easy task to build an accurate one.

Learn about various modes of transport and vehicles.

Learn about advertisements and their positive and negative effects.

Learn about the most important compounds of sodium and potassium.