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GEO 121 Class Notes- Chapter 3

by: Grace Johnston

GEO 121 Class Notes- Chapter 3 GEO 121

Marketplace > Miami University > Geography > GEO 121 > GEO 121 Class Notes Chapter 3
Grace Johnston

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Class and book notes for chapter 3
Introduction to Physical Geography
Dr. Bartosz Piotr Grudzinski
Class Notes
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This 3 page Class Notes was uploaded by Grace Johnston on Monday September 19, 2016. The Class Notes belongs to GEO 121 at Miami University taught by Dr. Bartosz Piotr Grudzinski in Fall 2016. Since its upload, it has received 6 views. For similar materials see Introduction to Physical Geography in Geography at Miami University.


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Date Created: 09/19/16
Grace Johnston GEO 121 1 o 3 CHAPTER 3 NOTES 9.13.16 Earth Sun Geometry and the Seasons Flammarion Engraving- 1888 Depicts a traveler who arrives at the edge of the Earth and sticks his head out of the firmament, the edge of the Earth into space Important people proving that the Earth was not flat 1. Plato proved the earth was round 2. Pythagoras proved it mathematically 3. Magellan said around the world- not falling off the edge proved that it was round 4. Copernicus theorized that the Sun was the center of our universe- the church said no and trumped that idea Stonehenge Video Notes June 21- Summer Solstice, longest day of the year December 21- Winter Solstice, shortest day of the year It was essential to watch the moon during the winter solstice Indicates the southernmost viewing axis Each 6 months before and after the moon moves In earlier times, the sun was used for survival, agriculture and important solstices for their rituals Most movements are CCW Aphelion- When the Earth is far from the sun (152 Mil km) Perihelion- When the Earth is close to the Sun (147 Mil km) Grace Johnston GEO 121 2 o 3 Geometric Relationship Between the Earth and Sun The sun is not moving around us, we are rotating, causing the different faces of the Earth to see the sun 365.24 days to complete one revolution around the sun (Hence leap year) Earth’s axial tilt Causes seasons Rotates at a 23.5* tilt around the sun Plane of Ecliptic- the annual path the sun takes Equinox: When the sun directly hits the equator Declination: The latitude at which the sun is directly overhead Sub-solar Point: Place on Earth where the sun’s rays strike at 90* Varies according to earth’s position along the orbit, no shadows Our Solar System Distance is ideal temperature wise- avoids extreme high and low temps Fuels winds, storms, ocean currents, clouds. Leads to physical erosion of the Earth’s surface Grace Johnston GEO 121 3 of3 Special Latitudes Solstice/Equinox VIDEO- Earth’s Tilt 2: Land of the Midnight Sun The earth is at an angle of 23.5* and is rotating on its axis once every day Summer Solstice When the northern hemisphere is at its max inclination towards the sun Winter Solstice When the southern hemisphere is at its max inclination towards the sun


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