What are diffusion processes?

Diffusion processes are when things spread out from where they're crowded to where there's more space.

Imagine you have a big bowl of jellybeans, and all the red ones are stuck in one corner. If you leave them alone for a while, slowly, the red jellybeans will move until they’re mixed with all the other colors, like when you drop food coloring into water and it spreads out. That’s a diffusion process!

Think of a playground at lunchtime: all the kids from one class are in one area, but as time goes on, they start to spread out and mix with the kids from other classes. No one is telling them to move, they just do it naturally because there’s more space elsewhere.

Diffusion happens because things always want to be evenly spread out. If something is crowded in one place, it will move until it's balanced everywhere. This isn’t magic, it’s just how the world works!