GEOG 1400 Chapter Notes - Chapter The Earth as a Rotating Planet : Coriolis Force, Orbit, Ecliptic

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29 Jul 2016
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AP GEOG 1400 – BOOK NOTES (Sept. 15)
The Earth as a Rotating Planet – (pgs. 53-63)
Earth-Sun Relationships
-Exploring basic Earth-Sun relationships and their profound consequences for the temperature
patterns that occur on the Earth’s Surface.
Earth’s Planetary Motions
Two concepts of planetary motion –
Revolution –
One complete circling of the Sun by a planet within its orbital path (ex. Earth needs 1 year to
revolve around the Sun)
Rotation –
Spinning on the axis (ex. It takes Earth one day to complete a full rotation on its axis).
-Axis –
Imaginary line from the North Pole to South Pole through the center of the Earth.
-The Sun’s heating (solar energy) is unevenly distributed, always varies in geographic space and
time.
Revolution
-Revolution around the Sun takes 365¼ days (determines the length of the year).
-Earth is nearly a sphere and Earth’s orbital path is nearly circular around the Sun.
-Earth is closer to the Sun in early January than early June.
-Distance between the Earth and Sun is approx. 150 million km.
oBut on January 3rd (when the Earth is closest to the Sun) the distance is about 147.3
million km.
-Perihelion –
Peri meaning near, and helios meaning sun (in Greek). Therefore it means the Earth is near the
Sun.
-From then on the distance between the Earth and Sun increases slowly until July 4th (half a year
later). The distance is about 152.1 million km.
-Aphelion –
Ap means away from, therefore meaning the Earth is far away from the Sun.
Rotation
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