This lesson presents the development of human speech and the structure and functioning of the organs of speech.
In this lesson you will learn about the basics of speech perception and language acquisition.
This lesson helps you understand the process of hearing.
Noise surrounds us everywhere, but it can be harmful. Let's see how.
Find out interesting pieces of information about the communication of animals.
Let's make musical instruments.
This lesson introduces some basic ideas about sound.
Let's find solutions to the global environmental issues!
This lesson presents the anatomy of the eye, the mechanism of vision, and common vision problems.
In this lesson you will learn about the presence of humans in space in the past, present and future.
This lesson presents the different types of forests and their layers.
This lesson presents the most important milestones in the history of aviation.
This lesson presents interesting facts about reptiles and their life.
This lesson introduces the position and anatomy of the heart, as well as the blood flow and heart sounds.
This lesson introduces you to the outer planets of the Solar System, that is the giant planets.
The lesson introduces you to various types of teeth and their functions.
A lesson about the special properties of glass, the process of glassmaking and the various types of glass.
This lesson encourages the use of the Global Positioning System.
This lesson presents the old and modern ways of utilising wind energy.
The plumage and streamlined bodies of birds play a key role in flying.