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This lesson helps you understand the process of hearing.
This lesson introduces some basic ideas about sound.
Find out interesting pieces of information about the communication of animals.
Noise surrounds us everywhere, but it can be harmful. Let's see how.
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.
Let's make musical instruments.
This lesson introduces you to the outer planets of the Solar System, that is the giant...
The lesson introduces you to various types of teeth and their functions.
This lesson presents the most important milestones in the history of aviation.
This lesson presents the anatomy of the eye, the mechanism of vision, and common vision...
This lesson presents interesting facts about reptiles and their life.
This lesson presents the different types of forests and their layers.
In this lesson you will learn about the presence of humans in space in the past, present...
The experiments in this lesson will introduce you to the various types of chemical reactions.
This lesson presents timekeeping devices and the types and units of time measurement.
Let's find out how many pieces of information are necessary for specifying a location.
This lesson presents the discovery of radioactive radiation and its positive and negative...
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.