Question

julianna blows air into a balloon to inflate it. what can be known about the atoms of the air? they are close together. they are moving constantly at high speeds. they vibrate in place. they are held together by strong attractions.

Explanation:

Air is a gas. Gas - phase atoms/molecules are in constant, high - speed motion. They are not close together (unlike solids and liquids), do not vibrate in place (characteristic of solids), and are not held together by strong attractions (weak intermolecular forces in gases).

Answer:

They are moving constantly at high speeds.