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Hot air rises and cold air sinks due to varying densities. Given the same volume of air, hot air is generally less dense compared to cold air. More »

www.reference.com Science Weather & Tides

Hot air rises and cold air falls because cold air molecules are densely packed together, making them heavier, and hot air molecules have more space between them, making them warm enough to rise. It is for this reason tha... More »

www.reference.com Science Weather & Tides

When hot and cold air meet, the warm air rises above the cool air, creating a low pressure zone. Warm air tends to cool as it reaches higher elevations, with the liquid in it condensing and forming clouds and rain. Cool ... More »

www.reference.com Science Earth Science Atmosphere
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Hot air rises and cold air falls because cold air molecules are densely packed together, making them heavier, and hot air molecules have more space between them, making them warm enough to rise. It is for this reason tha... More »

www.reference.com Science Weather & Tides

The circulation of air in the atmosphere is caused by the rotation of the Earth and energy from the Sun as warm air rises and the colder air sinks. Large scale air movement in the atmosphere is called atmospheric circula... More »

www.reference.com Science Earth Science Atmosphere

Cold fronts move faster than warm fronts because their cooler temperature increases the density of the air and concentration of molecules. Warm fronts are sometimes nearly motionless when cold fronts take them over. This... More »

www.reference.com Science Weather & Tides

When a cold air mass meets a warm air mass, a front is formed; if the cold air is replacing the warm air, it is known as a cold front. Cold fronts frequently cause rain showers or thunderstorms because they force air in ... More »

www.reference.com Science Weather & Tides