MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Hot and Cold

Why do hot ai...

Question

Why do hot air goes up and cool air comes down explain it with video

Open in App

Solution

Therefore, when you heat air it expands to allow more space for the molecules. If you then cool the air, it contracts because cool air molecules need less space thanhot air molecules. ... The molecules in a cool gas move slower, on average, thando molecules in a hot gas

Suggest Corrections

thumbs-up

10

Similar questions

Q. Ventilators are provided near ceilings in the rooms of our houses because:
1. Hot air is lighter than cool air.
2. Hot air rises up and cool air settles down.
3. Hot air is heavier than cool air.

Q. Near the Earth's surface _______ air rises up whereas _______ air comes down.

Q. (a) Why does hot air rise up?
(b) How does a hot-air balloon work? [3 MARKS]

When your body gets hot, the ___ release sweat which goes up through pores to the surface of your skin to cool you down.

Q. Write True (T) or False (F) against the following statements in the given brackets:
1. An anemometer measures the speed of sound. ( )
2. Cold air goes up but hot air goes down. ( )
3. Hurricane are wind currents. ( )
4. The centre of a cyclone is called the eye. ( )
5. The rotation of the earth affects the direction of winds. ( )
6. Convection current is the movement of hot and cold air. ( )

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Messengers of Heat

PHYSICS

Watch in App

explore_more_icon

Explore more

Standard VII Physics

Join BYJU'S Learning Program

CrossIcon