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. In the gaseous state, particles (atoms/molecules) have large spaces between them, move constantly at high speeds, and have weak intermolecular attractions. Option 1 is incorrect (gaseous particles are far apart). Option 3 describes solid particles (vibrate in place). Option 4 is incorrect (gaseous particles have weak attractions). So the correct description is that gas atoms (in air) move constantly at high speeds.

Answer:

B. They are moving constantly at high speeds.