Page 71 - Social Studies STD 3

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Chapter Seven

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The Solar system

Welcome to Chapter Seven. In Chapter Six, you learned how to
draw pictures. You also learned how to draw maps of different
objects. In this chapter, you will learn about the Solar system.
In addition, you will learn about the things which form the

Solar system. You will learn about the advantages of the Sun
and about other objects in the sky.

Ask yourself

What are the advantages of the Sun to human beings?

Things which form the Solar system
The Solar system is the arrangement of planets and other

celestial bodies. All these revolve around the Sun. The Solar
system is made up of stars and eight planets. Planets are
large, round objects in space that move around the Sun. They

do so through paths known as orbits. There are eight planets,
namely Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus,

and Neptune.

In addition, there are other bodies in the Solar system which
are comets, asteroids, and meteoroids. The Sun is also part

of the Solar system. Figure 1 indicates the arrangement of
planets in the Solar system.

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PROPERTY OF UNITED REPUBLIC OF TANZANIA GOVERNMENT
Ministry of Education, Science and Technology
Social Studies STD 3.indd 64 03/08/2019 11:39