When a bag of popcorn is opened in a room, the smell of the popcorn spreads throughout the room over time. Explain why this happens using ideas about particle motion. Be specific and detailed.

The aroma of the popcorn spreads throughout the room gradually due to the presence of air.

Explanation:

The popcorn bag releases an aroma when opened. This aroma then travels through the air due to which the aroma spreads throughout the room.

Note:

If the room was closed, the aroma will remain inside the room. If the room was open, the aroma will also spread beyond the room due to the presence of air.