Question

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.

Answer 1

Answer:

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.

Answer 2

Answer:

A

Explanation:

Think of it like an hot air balloon

Hot air makes it rise and cool air sinks it downwards