earths place in the solar system unit 10 assi 1 – Flashcards
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astronomical
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a unit of measurement based on the average distance of the earth from the sun; one unit equals 149.6 million kilometers
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dwarf planet
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an object that orbits the sun and is large enough for its gravity to make it spherical but that is too small to have cleared its orbit of all other large objects
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gas giants
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the four outer planets of the solar system; named for their high concentrations of hydrogen and helium
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planet
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an object that orbits the Sun, is spherical, and has cleared its orbit of other large objects
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terrestrial
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the four inner planets; named for their rocky crusts
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Which of the following criteria do astronomers use to classify an object as a planet?
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the object orbits a star
Its gravity makes the object spherical.
The object clears its orbit of other objects.
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How many planets in our solar system
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8
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Approximately, how far is the earth from the Sun?
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150,000,000 km
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1 A.U.
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= 150,000,000 km
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Astronomical unit
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the distance from the Sun to the earth
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The earth is the _____ largest planet.
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fifth
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The largest planet is _____.
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Jupiter
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For which of the following measures is Earth's the highest compared to the other planets in our Solar System?
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density
