|
Our planet and our lives are powered by |
radiant energy from the Sun |
|
The following about the Sun is true |
The Sun produces energy through fusion processes. |
|
Light travels at a speed of approximately |
300,000 kilometers per second |
|
The plane of Earth’s orbit about the Sun is called |
the plane of the ecliptic |
|
These accurately describes Earth’s distance from the Sun? |
-The Earth-Sun distance averages 150 million kilometers -It takes light an average of 8 mins and 20s from the Sun to Earth -Earth is closer to the Sun in Janurary (perihelion) and farther away in July (aphelion) |
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The Sun produces which of the following? |
mainly visible light and infrared energy |
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The solar wind consists principally of |
positively charged hydrogen nuclei and free electrons |
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Which of the following is NOT true about sunspots? |
They are brighter than the rest of the sun’s surface |
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On its way to Earth, the solar wind first encounters |
the magnetosphere |
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The auroras in the upper atmosphere are caused by |
the interaction of the solar wind and atmospheric gases |
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The dominant wavelength of energy emitted by the Sun is |
shorter than that emitted by Earth |
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The dominant wavelength emitted by Earth is |
infrared |
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Intercepted solar radiation is called |
insolation |
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The uneven distribution of insolation by latitude is primarily a result of |
Earth’s sphericity, which presents varied angles to parallel solar rays |
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High latitudes receive less energy than the equatorial regions because |
-The orientation of Earth’s surface relative to the Sun’s rays diminishes the intensity of solar radiation at high latitudes -The Sun’s rays must pass through more atmosphere at higher latitudes |
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What is the name of the location on the surface of Earth that receives isolation when the Sun is directly overhead? |
North Polar Point |
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On the northern hemisphere’s summer solstice, the north polar region receives_______ daily insolation than areas nearer the equator because_______. |
more; the Sun does not set. |
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The term "net radiation" refers to |
the difference in amount of incoming and outgoing radiation. |
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Which of the following is true regarding Earth’s axis? |
The axis is titled 23.5° from a perpendicular to the plane of the ecliptic. |
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On June 21, the Sun never sets a Finn’s locations. Based on this, it can concluded that Finn lives. |
above the Arctic Circle |
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Which of the following statements is true? |
March 21= equal day and nights everywhere on Earth |
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The equinox |
has 12 hours of day and 12 hours of night for all locations |
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At the speed of light, Earth is an average of only 8 min. and 20s from the Sun |
True |
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Earth is at perihelion in early January when it is closest to the Sun. |
True |
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Earth is farthest from the Sun at perihelion and closest at aphelion |
False |
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Energy is liberated within the Sun’s interior through a process known as nuclear fusion. |
True |
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The uneven distribution of insolation at the thermopause is caused by Earth’s curvature, with only the subsolar point receiving sunlight from directly overhead. |
True |
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All points of Earth’s surface experience the subsolar point at some moment during the year. |
False |
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Rotation is Earth’s motion on its axis; revolution is its motion about the Sun. |
True |
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Earth’s axis is tilted 23.5° from a perpendicular to plane of the ecliptic. |
True |
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