Why does the boiling point of water decrease at high altitudes?

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1. Why does the boiling point of water decrease at high altitudes?

Because of the generally high temperature found at altitude

Because atmospheric pressure is lower at higher altitudes

Because of generally low temperatures at altitude

Because atmospheric pressure is higher at higher altitudes

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Lower atmospheric pressure at high altitude means water molecules need less energy to escape into vapour, so water boils at a lower temperature than it would at sea level.