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# Class6 Earth Rotation And Revolution

## on Jan 22, 2010

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## Class6 Earth Rotation And RevolutionPresentation Transcript

• Presentation Made By:-Mudit Singh Vats Class - 6 th A, Roll No.-24 Motions of the Earth
• Motions of the Earth
• THE EARTH HAS TWO TYPES OF MOTION
• ROTATION
• REVOLUTION
• ROTATION
Earth rotates on its axis as it revolves around the Sun . REVOLUATION Motions of the Earth
• Rotation of the Earth
• The motion of the earth about its axis is known as rotation.
• The direction of this movement varies with the viewer’s position.
• From the North Pole the rotation appears to move in a counter-clockwise fashion.
• Looking down at the South Pole the Earth’s rotation appears clockwise.
Rotation of the Earth
• The Earth rotates once in twenty-four hours.
• The Earth’s rotation is responsible for the daily cycles of day and night.
• At any one moment in time, one half of the Earth is in sunlight, while the other half is in darkness. When the earth rotates we get day and night.
• The edge dividing the daylight from night is called the circle of illumination.
Rotation of the Earth
• Rotation dictates the length of the diurnal cycle (i.e., the day/night cycle)
• The earth rotates on an axis that is tipped over at about 23.5 degrees.
• Earth rotates at approximately 15 angular degrees per hour. So, the Earth's surface moves at the equator at a speed of about 467 m per second or slightly over 1675 km per hour.
Rotation of the Earth
• The earth revolves around the sun in an elliptical orbit. Revolution of the Earth
• It takes 365 days and 6 hours to complete one revolution.
• The distance between the earth and the sun changes due to revolution.
• This change of distance also causes change in seasons.
Revolution of the Earth
• The earth revolves in an elliptical shape.
• As the Earth revolves it gets closer and farther away from the sun.
• The angle that the sun hits the Earth causes the seasons.
Revolution of the Earth
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