Solar Energy - Solar Energy Chapter 2 Earth Science •...

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Solar Energy Chapter 2 Plane of the ecliptic 23.5 degree angle from the North Pole Points towards the star Polaris 23.5 degrees from the equator Always parallel to itself as it revolves the sun… this causes seasons “direct ray” has annually 2.5 times more energy than the poles… located at the equator… the energy diffuses as it heads towards the poles “oblique” June 21 st “Summer Solstice” is when the sun directly hits the tropic of cancer.. Effects the number of daylight hours. Earth Science Solar Energy Chapter 2, Earth Science
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Circle of illumination separates daylight from darkness… and on June 21 st night does not touch the arctic circle and never leaves the antarctic circle. September 21 st “Autumnal Equinox”… everyone has the same number of daylight and nighttime hours Earth Science
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Unformatted text preview: Solar Energy Chapter 2, Earth Science • December 22 “Winter Solstice” the opposite of the summer solstice. Antarctic always sunny, arctic always dark. • Get lots of agriculture from South America because it is their summer season during our winter. • March 21 st “Vernal Equinox”… the same as Autumnal Equinox Global Temperature changes • The polaris wobbles every 100 thousand years or so…. Explains the ice age • 150 years ago “little ice age”… lasted around 300 years • “malikovitch cycle” • 18,000 years ago, the coastline was much further than it is today… if the current trend of glacier melting continues, the coastline will move up to the memphis area…. We May have to relocate a lot of people. Earth Science Solar Energy Chapter 2, Earth Science...
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