Question

when one of your classmates opens his or her lunch box you can smell the food across the room.Why?

Answer 1

Hey friend as we all know that air molecules are losely packed and the air moves very fast the smell of food dislove into air molecules and move across the room that why we can get the smell of food all over the class room

Answer 2

When we open our lunch box in classroom the smell can spread over the room.

Explanation:

The main reason for the spread of food smell is air molecules. Basically air molecules are not packed tightly. So air moves very fast. The smell of the food dissolves into the air Molecules.

It moves across the room. This is the major cause of the spread of food smell in class room. Air Molecules are the reason for the smell.