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The Five Types of Science Fair Projects Top 4 Science Fair Project Books |
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| The Planet Venus | |
'The Earth and Venus are actually close to each other in size and mass, to the point that they have been called sister planets. Their atmospheres, however, are completely different, perhaps having to do with Venus' year being shorter than its day (it takes less time for Venus to go once around the Sun then it does to turn once around on its axis).'
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