Julianna blows air into a balloon to inflate it. What can be known about the atoms of the air?

Question

They are close together.
They are moving constantly at high speeds.
They vibrate in place.
They are held together by strong attractions.

Answer 1

When Julianna blows air into a balloon, the atoms of the air can be characterized by the following statement:

They are moving constantly at high speeds.

Air is composed of gas molecules, which are not closely packed together. Instead, they have a lot of space between them and move freely and rapidly in all directions. The other statements are more characteristic of solids or liquids. In gases, atoms and molecules are in constant motion, and the overall movement is typically at high speeds, especially in the case of the warm air that Julianna is blowing into the balloon.