which air is the heaviest summer or winter?

Question

im asking for my son this is for his homework

Answer 1

cold air is more dense, which makes it heavier.

Aloha

Answer 2

Summer

2 reasons.

1) The temperature thing mentioned numerous times above. Warm air is less dense.

2) The dewpoint (absolute humidity) of summer is GENERALLY higher than it is in winter. That means the moisture content is higher, and while the H2O molecule takes up the same space and displaces an air molecule (likely N2 or O2), it is considerably lighter than either, (18 as opposed to 28 or 32). Meteorologists use a concept called virtual temperature to substitute for actual temperature when using moist air in density calculations. Virtual temperature is a few degrees higher, usually.


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Answer 3

Effects of temperature and pressure
The formula for the density of air is given by:

ρ(rho) = p / ( R T)

where ρ(rho) is the air density, p is pressure, R is the gas constant, and T is temperature.

The individual gas constant R for dry air is:

287.05 J / kg °K

If Temperature drops, say in half, then the air density doubles.
So that means the air is heavier when its colder.

( I was originally thinking P1 V1/ T1 = P2 V2/ T2 and would show that at constant volume, the pressue increases as the temperature drops. But I forgot how to convert the pressure to density. SO I used the link below.) It even has a simple table relating temperature and density.

Answer 4

Winter. Cold air is heavier then warm air.
This is why a warm air balloon flies.

Answer 5

Cold air of course.

Answer 6

Warm air holds more moisture than cold air, so summer.

Answer 7

WINTER