Page 26 - Geography for Secondary Schools Student’s Book Form One

Geography for Secondary Schools
Student’s Book Form One
Chapter Movements of the Earth

Three in the Solar system

Introduction
FOR ONLINE READING ONLY
Our planet Earth is not static. It is constantly in motion, which makes it dynamic in
nature. This motion affects the Earth as a planet and all other life forms found on it.
Therefore, in this chapter, you will learn about the movements of the Earth in the solar
system and their effects. Such movements include rotation and revolution of the Earth.
Also, you will study about the imaginary lines on the earth’s surface. Such lines include
parallels and meridians. The competencies developed will enable you to understand the
natural world and inform many aspects of our daily life. It will also help you to monitor
and predict different events of the Earth as a celestial body, as well as to plan different
activities according to time and seasons of the year

Think

Earth's movement in the solar system

relation to the sun. Based on this scenario,
Rotation of the Earth
the one moving is the person in the moving
car not the trees or objects outside the
Activity 3.1
vehicle. This is just like the rotation of the
Read from library and other reliable online Earth; it is the Earth that rotates, not the
sources and search for simulation videos Sun. The term rotation means spinning of
on the meaning of the earth’s rotation, a body on its axis. An axis of the Earth is an
then make short notes. imaginary line joining the North and South
Poles through the centre. The earth’s axis
is tilted making an angle of 23½° from the
How the Earth rotates perpendicular. The earth rotates on its axis in

When travelling in a fast-moving vehicle, an anticlockwise direction, from West to East
while looking outside, the trees and other through 360° in 24 hours (Figure 3.1). This
objects outside the vehicle appear to move means that, the earth takes 1 hour to rotate
in the opposite direction. This observation through 15°, which is equal to 4 minutes
is similar to the movement of the Earth in for every 1°.

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