It explains that boiling point is the temperature at which a liquid's vapor pressure equals atmospheric pressure, and demonstrates how changes in pressure affect the boiling point of water through ...

From sweltering hot summer days to frigid winter nights, many people can experience exacerbations in respiratory symptoms of ...

so as water vapor increases, the density of air decreases. Temperature also changes the density of air. As air gets warmer it expands and becomes less dense, causing atmospheric pressure to fall.