​In the name of Allah Let's begin our Lesson for today.

​Motions of the Erath

You will be able to :

​1. identify the motions of the earth.

​

​2. identify the various motions of the earth and the results of this motions.

​

​Types of Motions:

​Like every planet of the solar system , our earth has two types of motions.

1. Rotation

2. Revolution

​Let's watch the video to see these two types.

​Rotation: is the movement of the earth on its axis from west to east.

​

​Revolution: is the movement of the earth around the sun in a fixed path.

​

​Rotation of the Earth.

​Rotate means to turn

​The earth turns around a slightly inclined imaginary line that joins two poles called the axis.

The axis of the earth has anis titled at an angle 66.5 with its orbital plane. Days and night take place because of this rotation.

​Definitions:

​Axis: The earth turns around a slightly inclined imaginary line that joins two poles called the axis.

​The circle of illumination: it is a circle that divides the day from night on the globe.

​

​

​Day and Night:

​The earth is spherical in shape, due to this , only the half of the earth that faces the sun illuminated, the other half that does not face the sun remain in darkness.

​Therefore, at a time that hemisphere of the earth that receives the sunlight experiences day. The other hemisphere away from the sun experience the night.

The duration of the day and night keeps on changing throughout the year. This happens due to the inclination of the earth's axis.