Question

when the cold air is heated it, a) expand b) contact c) either expand or contract​

Answer 1

Answer:

option a is correct

Explanation:

As the molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward.

Answer 2

Answers.

option ( a)

Explanation:

air like most expand when heated and contracts when cooled because there is more space between the moleculed the air is less dense than the surrounding matter and the hot air floats upwards