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Find out interesting pieces of information about the communication of animals.
Let's make musical instruments.
This lesson introduces some basic ideas about sound.
In this lesson you will learn about the basics of speech perception and language acquisition.
This lesson presents the development of human speech and the structure and functioning of the organs of speech.
This lesson helps you understand the process of hearing.
Noise surrounds us everywhere, but it can be harmful. Let's see how.
Simple, straightforward information about the coronavirus epidemic.
Let's find solutions to the global environmental issues!
In the body, substances are continiuously absorbed and released.
A lesson about the changes that take place in our bodies throughout our lifetime.
In this lesson, you will learn about buoyancy and the conditions of floating for objects.
Learn about the concepts of floor plan, map, and map scale.
“Health” and “illness” refer to two opposite states of the body. This lesson is about these states.
Albert Einstein’s life is surrounded by numerous legends, but the facts about him are also quite interesting.
Let's follow the path of water in plants from the roots to the leaves
Humans produce an increasing amount of waste. A change in our lifestyle could significantly reduce the production of household waste.
Apartments are like living organisms, there is a constant exchange of energy and materials between apartments and the environment.
A réteken, szántóföldeken és a gondosan ápolt kertekben is rengeteg növény telepedhet meg.
In this lesson, you will learn how mountains are formed.