The temperature of the air is not relevant, it is believed to be the absolute humidity level in the air that might affect the virus's ability to infect you more easily in one season than another. Cold and flu viruses thrive when dry. This is why the flu has a season, see the related question for more detail.
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Viruses are not really alive or dead like animals and plants, they are active or inactive. They are not cellular and do not function like a living organism.
Cold to warm
Warm air is lighter than cold air, that means that warm air will rise and the cold air will sink.
the cold air pushes the warm air up and forms cumulus clouds
When warm air pushes into cold air the result is a warm front.
Cold air has little moisture, warm air has lots. When cold air runs into warm air then the warm air is pushed up until the moisture in the air gets cold enough to form rain
Warm air is less dense (lighter) than cold air..that is why warm air rises and cold air settles
Cold to warm
what happens in cold and warm masses pressure
The density between cold and warm air is, cold air is heavier than warm air.
It pushes the warm air above the cold air
Warm air is lighter than cold air, that means that warm air will rise and the cold air will sink.
Warm air and warm water. Cold air and cold water keep ice cooler longer.
Warm air is lighter then cold air. So the cold air sinks and the warm air raise.
yes, but not that long, they will die out eventually.
cold air is heavier than the warm air warm air has low water so it is hot and low heavy but cold air has a lot of water so it cold and heavy
the cold air pushes the warm air up and forms cumulus clouds
There is really nothing interesting about cold fronts. Cold air is overtaking warm air. Since cold air is denser than warm air, cold air goes under a warm air mass.