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Why when siphoning, the liquid flow upward itself without pumping when there is gravity?

April 26, 2017flow gravity liquid physical Physics pumping sciences siphoning upward

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Why when siphoning, the liquid flow upward itself without pumping when there is gravity?

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It wouldn’t work on the moon — it requires atmospheric pressure to make a siphon. Gravity drives the whole process, but as the liquid descends on the downward portion, it “sucks” the liquid from the reservoir upward because it is pressurized by the atmosphere pressing down on it.