5 Questions
Which motion of the earth is responsible for the occurrence of day and night?
Rotation
What is the angle between the axis of the earth and its orbital plane?
66½°
What is the name of the circle that divides the day from night on the globe?
Circle of illumination
How long does it take for the earth to complete one rotation around its axis?
24 hours
What is the daily motion of the earth called?
Earthday
Study Notes
Earth's Motions
- The rotation of the earth is responsible for the occurrence of day and night.
Earth's Axis
- The angle between the axis of the earth and its orbital plane is 23.5 degrees.
Day-Night Boundary
- The circle that divides the day from night on the globe is called the circle of illumination.
Rotation Period
- It takes 24 hours for the earth to complete one rotation around its axis.
Daily Motion
- The daily motion of the earth is called diurnal motion.
Test your knowledge on the Earth's motions of rotation and revolution. Learn about the axis, orbital plane, and how these movements affect our planet's light and seasons.
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