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Physical Geography

Physical Geography. Seasons and Tilt. Our Planet, the Earth. How does the Earth move in space? Why do seasons change?. The Earth and the Sun. Days and Nights The Earth travels around the sun in an oval-shaped orbit.

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Physical Geography

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  1. Physical Geography Seasons and Tilt

  2. Our Planet, the Earth • How does the Earth move in space? • Why do seasons change?

  3. The Earth and the Sun Days and Nights • The Earth travels around the sun in an oval-shaped orbit.

  4. It takes 365 1/4 days, or one year, for the Earth to complete one revolution around the sun. • As the Earth revolves, it is also spinning on its axis. • Each rotation (or complete spin on the axis) takes about 24 hours. • It is daytime on the side facing the sun and night on the side away from the sun.

  5. The Earth and the Sun Understanding Seasons Why are the days longer in some parts of the year? • The Earth’s axis is at an angle. • In about half of the Earth’s orbit, the tilt causes a region to face toward the sun for more hours than it faces away from the sun. • Days are longer. • In other regions that face away from the sun for more hours, days are shorter.

  6. Why does the temperature change during the seasons? • The warmth you feel at any given time of year depends on how directly the sunlight falls on you. • Some regions receive a great deal of direct sunlight, while others receive very little. • This is also a result of the Earth’s tilt and orbit.

  7. Seasonsare times of the year when different amounts of sun’s energy reach earth. Seasons happen because of earth’s tilt on its axis. 661/2°N – Arctic Circle 231/2°N – Tropic of Cancer 0° - Equator 23 1/2°S – Tropic of Capricorn 66 1/2°S – Antarctic Circle

  8. Click on Slide!

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