As we stand and watch the hot air balloon rise in the sky, we can imagine what is happening at the microscopic level to the gas molecules inside the balloon. As the balloon rises, the gas molecules are

Responses
A moving faster and spreading apart.moving faster and spreading apart.
B slowing down and moving closer together.slowing down and moving closer together.
C gradually escaping from the confines of the balloon.gradually escaping from the confines of the balloon.
D all collecting at the top of the balloon, pushing upward.

1 answer

A. moving faster and spreading apart.