McC 8 Ch22 Sun-Earth-Moon System
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| axis | imaginary line around which the Earth spins
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| solar eclipse | occurs when the Moon moves directly between the Sun and Earth and casts a shadow on Earth
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| Lunar Prospector | launched in 1998 by NASA to continue photographing the Moon and collecting data
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| maria | dark-colored, relatively flat regions of the Moon's surface formed when interior lava filled large basins
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| full moon | all of the Moon's surface that faces the Earth is lit up
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| summer soltice | occurs on June 21 or 22 in the northern hemisphere
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| sphere | round, three-dimensional object such as Earth
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| revolution | yearly orbit of Earth around the Sun
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| impact basins | created when meteorites or other objects strike the Moon
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| Earth rotates on its axis about every | day
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| waning crescent | phase of the moon that immediately precedes the new moon
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| waning gibbous | occurs after the full moon, a large portion of the Moon's surface is lit
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| magnetic north pole | a north pointing compass needle faces this
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| lunar eclipse | Earth is positioned between the Sun and the Moon casting a shadow on the Moon
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| solar eclipse | Moon is positioned between the Sun and the Earth casting a shadow on the Earth
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| penumbra | light-colored outer shadow on Earth's surface cast by the Moon during a solar eclipse
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| umbra | dark shadow on the Earth's surface cast by the Moon duing a solar eclipse
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| cause of lunar eclipse | Earth casts a shadow on the moon, occurs in full moon phase (sun-earth-moon)
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| cause of solar eclipse | moon casts a shadow on the Earth, occurs in new moon phase (sun-moon-earth)
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| Does the solar eclipse or the lunar eclipse have a larger umbra? Why? | Lunar - Earth larger than Moon and casts a larger shadow on the Moon than the Moon casts on the Earth during a solar eclipse
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| How does the Earth's tilt lead to seasonal changes? | hemishpere tilted toward the sun has higher temperatures(summer) than when it is tilted away(winter)
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| Plane of the Ecliptic | apparent path the sun travels in the sky, along which the planets orbit and the zodiac constellations are found
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| circumpolar constellations | constellations that appear to rotate around Polaris and never dip below the horizon
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| examples of circumpolar constellations | Draco, Cassiopeia, Cepheus, Ursa Major, Ursa Minor
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| Celestial Equator | the projection of the Earth's equator into space
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| location of the Celestial Equator & Plane of the Ecliptic during a Solstice | they are farthest apart during a solstice (sun is farthest away from the equator)
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| location of the Celestial Equator & Plane of the Ecliptic during an Eclipse | they intersect during an eclipse (sun is above the equator
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| Earth's Rotation | 24 hours, spin on axis, causes day and night
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| Earth's Revolution | 365.25 days, orbit around the Sun
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| asterism | a smaller star pattern within a constellation Ex. Big Dipper, Little Dipper
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| During which moon phase does a lunar eclipse occur? | Full Moon
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| How was the moon formed? | Impact Theory - large object struck Earth and material that was thrown off formed the moon
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