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32 Cards in this Set
- Front
- Back
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The geocentric model of the solar system has the planets..
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and the moon and sun orbiting Earth.
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What does the heliocentric model of the solar system state?
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Earth and the other planets orbit the sun.
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Who was the first person to propose a heliocentric model of the universe?
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Aristarchus.
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After the Middle Ages, the astronomer who changed the model of the solar system by placing the sun at it's center was..?
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Copernicus.
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Which astronomer discovered that the planets orbit the sun in oval-shaped paths called ellipses?
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Kepler.
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Galileo's most important contribution to astronomy was his...?
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Description of the behavior of moving objects.
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Issac Newton was the first person to formulate and test the law of...?
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Universal gravitation.
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The spinning of Earth on its axis is called...?
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Rotation.
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What is Earth's motion in its path around the sun called?
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Revolution.
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What is percession?
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The slow change in the direction in which Earth's axis tilts.
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What causes the moon's phases?
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Changes in how much of the sunlit side of the moon faces Earth.
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The cycle of the moon through its phases, or the synodic month, is...?
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29/2 days long.
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A solar eclipse occurs when...?
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The moon casts a dark shadow on Earth.
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During a total lunar eclipse, the moon...?
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Moves into Earth's umbra.
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What causes the erosion of rocks on the moon's surface?
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Impacts of particles from space.
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What is the soil-like layer on the moon's surface called?
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Regolith.
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Long valleys or trenches associated with maria are...?
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Rilles.
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Which of the following are NOT present on the moon? A.) light, B.) gravity, C.) atmosphere, D.) heat
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Atmosphere.
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The most widely accepted model for the origin of the moon involves...?
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A large body hitting Earth and ejecting debris that became the moon.
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Which of the following lunar features is the oldest? A.) surface regolith, B.) highlands, C.) craters with rays, D.) maria basins
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Highlands.
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The geocentric model of the solar system was proposed by the astronomers of ancient ______
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Greeks.
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The planetary system of Ptolemy had the planets moving in circular orbits around ____
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Earth.
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The ______ motion of planets is when they appear to move eastward among the stars, then stop and reverse direction.
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Retrograde.
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The Danish astonomer ___ made precise measurements of the locations of bodies in the solar system, especially Mars.
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Brahe.
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The average distance between Earth and the sun is about _____ million km, or one _________ unit.
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150 million km && astronomical
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The mass of an object is a measure of the total amount of ____ it contains.
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Matter.
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The Earth movement that causes night and day is called ______
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Rotation.
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Earth is closest to the sun on about January 3rd at _____ and is farthest from the sun on about July 4th at _____
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Perinelion && Aphelion
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Because of ____, the North Star will no longer be Polaris in several thousand years.
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Precession.
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The moon is closest to Earth at _____ and farthest away at _____
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Perigee && apogee.
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Bright splash marks that radiate outward from craters for hundreds of kilometers are ______
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Rays
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Most of the moon's surface is covered by ______, which are densely pitted, lightcolored areas.
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Highlands.
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