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Earth’s Rotation

Earth’s Rotation. DAY and NIGHT. 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. . N O R T H. S O U T H. P O L E. P O L E. DAY and NIGHT.

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Earth’s Rotation

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  1. Earth’s Rotation

  2. DAY and NIGHT • 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. N O R T H S O U T H P O L E P O L E

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

  4. DAY and NIGHT • 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. DAY and NIGHT • 1 FULL rotation on Earth’s Axis = 1 day (24 Hours)

  6. Seasons • 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. Seasons • Earth’s orbit is NOT quite a perfect circle. Earth is about 5 million kilometers further away then the Sun Earth is about 5 million kilometers closer to the Sun 148,000,000 km 153,000,000 km

  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. Seasons • Equinox – sunlight shines equally on the northern and southern hemispheres. • 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 21st day of certain months of the year.

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

  11. HOMEWORK • Unit E : Space Science : Chapter 2 : Page 49 : Questions : 1- 6

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