perfume or air freshener, hand-held
timer, bowl of water, food coloring
1. Have one
person stand in the front of a room and one
in the back.
2. Have the
person in the front of the room spray the
perfume or air freshener.
3. The person
in the back of the room should time how long
it takes to smell the odor.
three drops of food coloring into a bowl of
water. Do not stir.
and time how long it takes for the food
coloring to spread across the bowl.
how the odor got to the back of the room and
how the food coloring spread through the
7. Can you
think of any other examples of diffusion
that you encounter every day?