Page 235 - New Medley 3 Semester 1

All the planets and satellites move around the sun. All these make a

family called the solar system. There are eight planets in the solar system.

The Earth where we all live in is also Uranus

a planet. It is the only planet where Mars Neptune
life exists. Our Earth has atmosphere Venus Saturn

(a layer of air), water and land on it. Sun EARTH Jupiter
Mercury
Air is a mixture of different gases. All

living things need air and water to live
on the Earth. Solar System

• Critical thinking

Write True or False.
1. The sun is a star. 2. The Earth is a star.

3. The moon is a heavenly body. 4. All living things need air.

Shape of the Earth

What the shape of the Earth, was a great
question and mystery to the early people.

Early people did not know much about the
Earth. They only noticed the flat surface or

open sea. So, they believed that the Earth
was flat and had an edge. They did not travel

too far, because they feared that if they would
go near the edge, they might fall. But, some Aristotle Magellan

people like Aristotle and Copernicus believed that the Earth was not
flat but it was round like a ball.

About 500 years ago, Ferdinand Magellan, Knowledge Zone

a Portuguese sailor, along with other sailors   About seventy per cent of our
Earth is water. So, the Earth is
sailed from Spain towards the west. They called the blue planet.
kept on sailing westward. After sailing for   There are eight planets in the
about three years, Magellan’s team reached solar system. The Earth is the

the same place where they had started from, fifth largest planet.

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