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Noise surrounds us everywhere, but it can be harmful. Let's see how.
Let's make musical instruments.
Find out interesting pieces of information about the communication of animals.
This lesson helps you understand the process of hearing.
This lesson presents the development of human speech and the structure and functioning of...
In this lesson you will learn about the basics of speech perception and language acquisition.
This lesson introduces some basic ideas about sound.
The lesson introduces you to various types of teeth and their functions.
This lesson presents the anatomy of the eye, the mechanism of vision, and common vision...
This lesson presents the most important milestones in the history of aviation.
This lesson presents the different types of forests and their layers.
This lesson presents interesting facts about reptiles and their life.
In this lesson you will learn about the presence of humans in space in the past, present...
This lesson introduces you to the outer planets of the Solar System, that is the giant...
This lesson presents timekeeping devices and the types and units of time measurement.
The experiments in this lesson will introduce you to the various types of chemical reactions.
Find out what types of bones there are and what anthropologists do!
Let's find out how many pieces of information are necessary for specifying a location.
This lesson presents the internal structure of Earth, the geospheres and their general...
This lesson presents the production of waste water, its treatment and environmental impact.