THIS IS A SCIENCE QUESTION Which choice describes how temperature differences affect air?

A. Hot air rises, and cold air sinks.

B. Hot air sinks, and cold air rises.

C. Hot air is steady, and cold air moves fast.

D. Hot air moves fast, and cold air rises.

A

Explanation:

Hot air is less dense therefore it rises. Cold air is more closely packed therefore it is more dense. Less dense things rise while more dense things sink.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

girl imma just put my comment here because i need a couple point okurrttt