Diffusion A presntation bY tahjioNna robInson

What is diffusion

Diffusion is the spreading of particles or molecules from high concentration areas, to low concentration areas. Another way of explaining diffusion is the movement of substances from areas of low concentration to areas of high concentration. According to, "www.Reference.com" Diffusion comes the Latin word diffudre which means, " to spread and move outward." Concentration is how much of a particle you have per unit space. Diffusion is a type of passive transport, which means that it would take no energy for a molecule to move in or out of a cell. Diffusion is caused when the heat in a gas or water environment creates energy that is absorbed by particles, making them move. This is referred to as thermal motion. This causes each particle to move away from an area that is highly concentrated. According to, "www.Quora.com" Albert Einstein discovered diffusion in 1905, but wasn't awarded for it until 1922. Surprising right? According to,"www.YourDictionary.com," some examples of everyday diffusion are the following.

You can smell perfume because it diffuses into the air and makes it way into your nose.

A teabag placed in a cup of hot water will diffuse into the water.

Cigarette smoke diffuse into the air.

Placing food coloring in a liquid will diffuse the color,

As you can see diffusion isn't that advanced once you look at the things you can see.

How does temperature affect the process of diffusion?

In order to find the answer to my question, I had to perform an experiment. First, I found two bottles of room temperature water, and poured it out. I filled one of the bottles with hot water and the other with cold water. Then, I set up my camera and asked my sister to drop the blue dye in the cold water, and the yellow dye in the hot water at the same time. After two minutes and three seconds, I added a second drop of food coloring in each bottle of dyed water to see it more clearly. Then, I watched to see which temperature of water could make the dye diffuse faster. Then, I rewatched the video and recorded my data.

Photo From Experiment


After conducting my experiment, I determined that hot water helps food coloring to diffuse faster. After watching both bottles of dyed water I realized that they looked the same, but after watching very closely I determined that the dye in the hot water was ahead of the dye in the cold water by a few seconds. By dropping more food dye in I really noticed a difference. Therefore, I believe that heat speeds up the rate of diffusion. This data supports my hypothesis because I originally thought that hot water would speed up the process. I think this happened because of the density of the solvent (water). My experiment was not valid because I could have made the hot water hotter and the cold water colder as then it would have made it easier to determine which was faster.

Over the next few weeks, I plan to research other biology topics. I would also like to test the natural speed of diffusion.


( The photos after this one will be during the experiment.)

After 5 seconds

After 30 seconds

After 1 minute

After 2 minutes

Hot water fully diffused ( after 3 minutes )

Photos Explaining Diffusion
Created By
Tahjionna Robinson


Google " What is diffusion?" Reference. n.p. n.d. Steinhardt, Allan. "Who discovered diffusion." Quora. n.p., 2015. " Examples of everyday diffusion." YourDictionary. n.p. n.d.

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