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CANDY 
DIFFUSION

Science Behind the Experiment

What's the science behind the candy diffusion experiment?
The candy diffusion experiment shows how sugar from the candy spreads into water. It happens because of a process called osmosis.

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How does osmosis work in this experiment?
Osmosis is when molecules move from an area where there's a lot of them to an area where there are fewer. In the candy experiment, the sugar molecules inside the candy move into the water where there's less sugar.

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Why does the candy coating dissolve in water?
The candy coating is made of sugar molecules stuck together. When we put the candy in water, the water molecules break the bonds holding the sugar together, causing the candy coating to dissolve.

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What makes the colored sugar spread in the water?
As the candy coating dissolves, the colored sugar is released into the water. The water molecules bump into the sugar molecules and carry them along, making them spread out evenly in the water.

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Can osmosis happen with other things, not just candy?
Yes, osmosis happens in many different things. It's a natural process that occurs in cells, plants, and even our own bodies. For example, when you put a slice of cucumber in saltwater, the water moves out of the cucumber through osmosis, making it shrivel up. Osmosis is also important for plants taking in water and nutrients and helps our cells maintain a healthy balance.

What You Will Learn

The candy diffusion experiment with Skittles explores the process of diffusion, which is the movement of molecules from an area of high concentration to an area of low concentration. In this experiment, water acts as a solvent that dissolves the colored dyes on the Skittles' outer shell. As the water comes into contact with the candies, the dyes begin to dissolve and spread out into the surrounding water, creating a colorful display. Through this experiment, we can observe how molecules move and mix to create vibrant patterns, providing a fun and interactive way to learn about diffusion in action!

Download the PDF version

Supplies

  • Skittles candies (different colors)

  • White plate

  • 1/2 cup of water

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Steps

Step 1

Place the Skittles in a circle on the plate, leaving some space between them. Have fun choosing different colors to create different patterns!

Step 2

Pour 1/2 cup of water slowly into the center of the plate.

Step 3

Watch what happens to the Skittles as time passes. Observe any changes in color or patterns.

Step 4

After a while, carefully remove the Skittles from the plate and see the final results. Take pictures or draw what you see!

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