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Water boils at a lower temperature on the hills because
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- it is cold on the hills
- there is less carbon dioxide on the hills
- there is a decrease in air pressure on the hills
- There is less oxygen
- it is cold on the hills
Correct Option: C
Water boils at a lower temperature on top of a mountain because there is less air pressure on the molecules. Water boils when the vapor pressure of water exceeds atmospheric pressure. Because the boiling temperature is lower at high elevations foods that are cooked by boiling take a little longer to cook at high elevation.
