* Google Images: You can search for "diffusion diagram" in Google Images and find several diagrams that show how diffusion works.
* Wikipedia: The Wikipedia article on diffusion includes several diagrams that show how diffusion works.
* Boundless: The Boundless website has several pages on diffusion, which includes diagrams that show how diffusion works.
* Textbooks: Many textbooks on chemistry or physics will have diagrams that show how diffusion works.
* Scientific journals: Scientific journals often include diagrams that show how diffusion works.
