ELI5: Explain Like I'm 5

Paste (rheology)

Okay kiddo, do you know what paste is? It's like a thick mixture that you can squeeze out of a tube or container. But, have you ever tried to squeeze out toothpaste or glue that's almost empty? It's really hard, right? That's because of something called rheology.

Rheology is just a big word that means how things flow and move. And paste has its own special kind of rheology. When you try to squeeze out a really thick paste, it doesn't flow as easily as a thinner liquid like water. That's because the paste has something called "viscosity", which is like how sticky or thick it is.

So, when you try to squeeze out toothpaste, it might bend or even break before it comes out. That's because of the paste's viscosity. But, once you get the toothpaste flowing, it becomes easier to squeeze out because the viscosity changes a little bit.

Overall, paste (rheology) is just how thick and sticky something is, and how it moves or flows. So, next time you're trying to get that last bit of toothpaste out of the container, you'll know it's not just your tiny hands struggling - it's science!