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Plants also move. Although they do not have muscles, they can change the position of their organs.
This lesson introduces some basic ideas about sound.
This lesson presents the structure and classification of bacteria and the role they play in our lives.
This lesson provides evidence of Earth's rotation and presents its consequences.
The lesson introduces you to the movement of Earth around the Sun.
Albert Einstein’s life is surrounded by numerous legends, but the facts about him are also quite interesting.
Learn about the human sense organs and their functions and how to keep them healthy.
In this lesson, you will find out where tropical rainforests are located on Earth and learn about their fauna and flora.
The lesson presents the components of a healthy diet.
In this lesson you will learn about the history of fire and the conditions necessary for the combustion with flame.
Let's catch a glimpse into the world of microscopic unicellular organisms!
The lesson introduces you to various types of teeth and their functions.
In this lesson you will learn more about this special liquid.
Let's use musical instruments and our vocal cords as sources of sound.
In this lesson you will learn about the mysterious world of alchimists.
Let's find out interesting facts about the flora and fauna of polar regions and the living conditions in those areas!
In this lesson you will find out where deciduous forests are located on the Earth and their fauna and flora.
Find out what types of bones there are and what anthropologists do!
Learn about the discovery of radioactive radiation and its positive and negative applications.
Let's learn about the social and economic implications of the Industrial Revolution.
This lesson presents timekeeping devices and the types and units of time measurement.
This lesson presents the production of waste water, its treatment and environmental impact.