GEOG 1112: Lecture 1
21 Cards in this Set
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The point where the earth is farthest from the sun is called what?
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aphelion
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The earth's orbit forms a what around the sun?
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an elliptical
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The earth is closest to the sun during the northern hemisphere _____________.
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winter
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The shape of the earth's orbit around the sun __________________.
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changes over time
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The main reason it is winter in the northern hemisphere is because what?
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the sun is closest
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Places that are curved away from the sun receive less what?
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insolation
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The point that is receiving insolation from directly overhead (perpendicular, 90 degrees) is called the what?
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subsolar point
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The latitude is receiving insolation from directly overhead is called what?
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declination
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Not all places receive the same amount of light because what?
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the sun's rays are received at more of an angle.
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RED NOTE: As the tilt changes, the North (pole) star will not be what?
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Polaris
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What will be the north star AD 3000?
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Alrai
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The tilt of the earth's axis is currently what?
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23.5 degrees
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The earth _________ around its axis.
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rotates
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Right now, the earth's tilt is what?
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lessening
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What is when the tilt of the earth is in fixed alignment: the north star is always above the north pole?
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axial parallelism
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During a solstice, the sun's direct rays are ___________________ of the equator.
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23.5 degrees N or S
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During the winter, the sun's direct rays are what?
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farther away, so temperatures are colder
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Solstices occur when?
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June and December
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The farthest the sun's direct rays ever get is what?
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23.5 degrees N latitude
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The direct rays of the sun are over the Tropic of Capricorn when?
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December
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The direct rays of the sun are over the Tropic of Cancer when?
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June
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GEOG 1112: Lecture 4