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Rotation and revolution powerpoint
This presentation discusses the effects of rotation and revolution on Earth. Rotation is the movement of Earth on its axis, causing day and night as well as high and low tides. Revolution is Earth's orbit around the sun, which causes the four seasons due to the tilt of Earth's axis. Revolution also results in varying lengths of days and nights throughout the year and changes in the altitude of the midday sun.
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Rotation and revolution powerpoint
- 1. The Effects ofRotation and Revolution on the Earth Presenter: Monique Thompson
- 2. Introduction This presentation isgeared towards informing the viewers about the effects of rotation and revolution on the Earth.
- 3. Objectives At the endof the presentation you should be to: define rotation explain the effects of rotation define revolution explain the effects of revolution
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- 5. Definition of Rotationof the Earth Rotation is the movement of the Earth on its axis over a twenty four (24) hours period. The speed of rotation is 24, 855/ 24 hours or 1,038 miles/hr.
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- 7. The Effects ofRotation on the Earth
- 8. Day and Night Asthe earth rotates on its axis, half of the earth faces the sun and half of the earth faces away from the sun. The half of the Earth that faces the sun will experience day while the half of the Earth that faces away from the sun will experience night.
- 9. Image of Dayand Night The half of the earth that is facing the sun rays will experience day while the half of the sun that is away from the sun rays will experience night.
- 10. High and LowTide High and low tide is a result of the gravitational pull between the sun and the moon. When the earth rotates, the sun and the moon pulls it, however, one of the force is usually stronger than the other. Hence, we will experience high and low tide.
- 11. Image of Highand Low Tide High Tide Low Tide
- 12. Windspeed and Direction Windon the earth comes from north, south, east and west direction. As the earth rotates on its axis, different places will get stronger surge of wind as a result of the speed of the rotation.
- 13. Image of Windspeedand Direction Windspeed and Direction are how fast the air is moving and from which direction.
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- 15. Definition of Revolution Revolutionis the movement of the earth around the sun, this last for 365 and ¼ days. Earth revolves around the sun in a slightly eccentric elliptical orbit once a year. The speed of earth’s revolution is about 18 miles per hour.
- 16. The Effects ofRevolution on the Earth
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- 18. Summer Summer Solstice marksthe beginning of summer on June 21/22. June 21 is the longest day. When it is summer in the northern hemisphere it will be winter in the southern hemisphere and the sun is directly over the tropic of cancer.
- 19. Winter Winter Solstice marksthe beginning of winter on December 21/22. December 21 is the shortest day.
- 20. Winter When it iswinter in the northern hemisphere it will be summer in the southern hemisphere and the sun is directly over the tropic of capricorn.
- 21. Spring Spring Equinox marksthe beginning of spring on March 20/21. When it is spring in the northern hemisphere it will be autumn in the southern hemisphere and the sun is directly over the equator.
- 22. Spring Ohh, I justlove Spring. The flowers are blooming and the air smell so fresh.
- 23. Autumn Autumn Equinox marksthe beginning of autumn on September 22/23. When it is autumn in the northern hemisphere it will be spring in the southern hemisphere and the sun is directly over equator.
- 24. Varying Length ofDay and Night The effects of revolution causes varying length of day and night. In December the sun is directly over the tropic of capricorn, therefore, there will be shorter days and longer night. In June, the sun is directly over the tropic of cancer, therefore, there will be longer days and shorter nights.
- 25. Changes in theAltitude of the Midday Sun The earth’s revolution round the sun with its axis inclined at 66 ½ degree to the plane of earth’s orbit changes the apparent altitude of the midday sun.
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