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The band of constellations through which the planets appear to move as observed from Earth is called the ....
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Zodiac
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Retrograde motion of Mars was explained in the geocentric system by using a geometric construct called the ....
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Epicycle
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The geocentric system is also called the ..... system.
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Ptolemaic
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True or False: Copernicus is famous for defending the geocentric system.
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False
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The first real evidence for the prediction of the heliocentric model that not all celestial bodies orbit the Earth was found by the Italian astronomer .....
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Galileo
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True or False: Kepler is famous for his telescopic investigations of the planets
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False
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What law of motion of Newton can be described as 'F=ma'?
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2nd
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The density of matter is mass divided by ....
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Volume
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The density of Jupiter is larger/smaller/the same than that of water
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Larger
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The most abundant element in the solar system is .....
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Hydrogen
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The second most abundant element in the solar system is ....
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Helium
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An astronomical unit is approximately equal to how many million kilometers?
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150
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Deuterium has a neutron in addition to a proton in its nucleus and is therefore one of the
.... of hydrogen.
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Isotopes
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The phase diagram of water shows that under sufficiently low pressures water ice when heated goes immediately into the ...... phase without turning into a ...... first.
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Gas; liquid
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By mass, there is approximately 1/2/3/4 (Choose one) times more hydrogen than helium in the solar system
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3
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