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11 Cards in this Set
- Front
- Back
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If Earth's spin axis were perpendicular to the plane of its orbit (the ecliptic plane), seasonal variations on Earth... |
would be nonexistent. |
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The angle of tilt of Earth's spin axis to the direction perpendicular to the ecliptic plane is about... |
23.5 degrees. |
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Which of the following statements is NOT correct for eclipses in the Sun-Earth-Moon system? A) A total eclipse of the Sun occurs only at full Moon. B) A total eclipse of the Moon occurs only at full Moon. D) Eclipses of the Moon and Sun do not occur at quarter Moon phases. |
A |
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The Sun passes crosses the celestial equator... |
at two points, known as equinoxes. |
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How does the Moon rotate in order to keep one face pointed towards the Earth at all times? |
It rotates once per month. |
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At approximately what time will the new Moon rise? |
close to sunrise. |
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What is the correct sequence of appearances of Moon phases in the sky? |
Waxing crescent, first quarter, waxing gibbous, full Moon. |
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At noon in June, shadows in Las Cruces are longer/shorter than shadows at noon in December? |
Shorter. |
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Summertime in the northern hemisphere occurs when Earth is closer to the Sun than in winter. |
False. |
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Seasonal variations on a planet's surface are caused by... |
the tilt of the planet's spin axis with respect to the perpendicular to its orbital plane. |
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Why do we see different phases of the Moon? |
Because the half of the Moon that is illuminate by the Sun becomes more or less visible from Earth as the Moon orbits it. |
