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Evening Things Out


For a better understanding of diffusion, follow these simple steps.



Materials: 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.

4. Place three drops of food coloring into a bowl of water. Do not stir.

5. Observe and time how long it takes for the food coloring to spread across the bowl.

6. Explain how the odor got to the back of the room and how the food coloring spread through the water.

7. Can you think of any other examples of diffusion that you encounter every day?