UNIVERSE
ATMOSPHERIC BASIC PROPERTIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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warm
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cold
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Either A or B
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None of the above
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Detailed explanation-1: -Warm air is lighter than cold air because its particles have more heat energy, which results in the increase in distances between the molecules. This decreases the density, and hence makes it lighter than cold air.
Detailed explanation-2: -In January, when air temperatures average 20.7 C (69F), the average pressure is 1019.1 mb. In June, when the average air temperature is 27.6C (81.7F), the average air pressure is 1015.0 mb. As you can see, air pressure does vary according to temperature. Cold air is more dense than warm air, i.e., it weighs more.
Detailed explanation-3: -Air Density and Temperature This is because warmer molecules of air move faster, creating an expansion effect that decreases air density. Colder air moves slower, collects together, and sinks with higher density.
Detailed explanation-4: -What is heavier, cold air or hot air? Cold air is always heavier than an equal volume of hot air. “Air” is actually a mixture of several gases.