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About 71% of ____ is covered by water.
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1. Mercury
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Due to its low density, ____ could theoretically float on water.
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2. Venus
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The presence of ____ was mathematically predicted in 1846.
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3. Earth
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Due to iron oxide (rust) on its surface, ____ appears red.
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4. Mars
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____ has a Great Red Spot, which is a massive persistent storm.
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5. Jupiter
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____ has 27 known moons and, like Neptune, a faint ring system.
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6. Saturn
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The moons Ganymede and Titan are larger than the planet ____.
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7. Uranus
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Due to its thick CO2 atmosphere, ____ is the hottest planet.
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8. Neptune
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