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 Axis of Rotation  Axis of Rotation – an imaginary line running through Earth’s center that allows Earth to rotate.  End of the axis are the NORTH.

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Presentation on theme: " Axis of Rotation  Axis of Rotation – an imaginary line running through Earth’s center that allows Earth to rotate.  End of the axis are the NORTH."— Presentation transcript:

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2  Axis of Rotation  Axis of Rotation – an imaginary line running through Earth’s center that allows Earth to rotate.  End of the axis are the NORTH and SOUTH poles. NORTHNORTH P O L E SOUTHSOUTH

3  Any location on Earth’s surface moves from WEST to EAST as Earth turns. North Pole The way Earth Rotates

4  ½ Earth is in Sunlight  ½ Earth is in Darkness If it is noon at one location, what time is it at a location directly on the other side of the Earth?

5  1 FULL rotation on Earth’s Axis = 1 day (24 Hours)

6  Revolution  Revolution – the motion of one object around another. The Earth is tilted at about a 23.5 degree angle. If Earth’s rotation and orbit lined up perfectly what would that mean for Earth’s Seasons?

7  Earth’s orbit is NOT quite a perfect circle. Earth is about 5 million kilometers closer to the Sun 148,000,000 km153,000,000 km Earth is about 5 million kilometers further away then the Sun

8  Seasons  Seasons – patterns of temperature changes and other weather trends over the course of a year. Near the poles, very large changes in temperature from winter to summer. Near the equator, very little temperature changes all year.

9  Equinox  Equinox – sunlight shines equally on the northern and southern hemispheres.  Solstice  Solstice – the area of sunlight is at a maximum in one hemisphere and a minimum in the other hemisphere.  Both occur on or around the 21 st day of certain months of the year.

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11 The further from the equator the more extreme the changes in day length become. In the North Pole the sun does not set at all for 6 months at a time. In the South Pole the sun does not rise for 6 months at a time. Near the equator, the periods of daylight and darness are almost equal year-roudn. ~ 12 hours

12  Unit E : Space Science : Chapter 2 : Page 49 : Questions : 1- 6


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