Motion of the Earth
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Transcript of Motion of the Earth
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Motion of the Earth
Chapter 2.1 Day and NightEarth’s Seasons
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I. The Earth Moves in two different ways.A. Rotation- The Earth rotates on its axis.1. The Earth spins one time every 24 hours.2. The rotation of Earth causes night and day.3. The Earth rotates counter clockwise.
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B. The Earth revolves around the Sun.1. Earth circles the Sun once a year or every 365 ¼ days. 2. The Earth circles the Sun in an elliptical orbit. (big oval).3. Revolution is involved in causing the seasons on Earth.
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II.Seasons on Earth are caused by its revolution and tilt.A. The Earth is tilted 23.5 from its orbit.B. The North Pole faces the same way, into space, all year.
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C. There are four seasons caused by Earths tilt.
1. September equinox - Equal amounts of sun light hit the Northern and Southern hemispheres. This is fall in the North.2. December Solstice- The north pole is tilted away from the Sun, causing Summer in the southern hemisphere.
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3. March equinox- Equal amounts of sun light hit the Northern and Southern hemispheres. This is fall in the south. This is Spring in the North. 4. June Solstice- The north pole is tilted towards the Sun, causing Summer in the North.