Why Does Glue Stick?

What Crafty Clover says in this video

Intro

Hi! I'm Crafty Clover! Let's discover something amazing. Why does glue stick?

The Big Idea

Glue is a liquid bridge that turns solid. It wets both surfaces and seeps into tiny pores. Then it hardens, so the two things share one skin! Let's find out how it works, in three easy steps!

Step 1

Step one: the glue flows in! A thin wet layer coats the paper, and it hugs microscopic hills and fills the tiny pores. That's how it grabs on tight.

Step 2

Step two: the water leaves! The liquid part dries into the air, and that leaves a thin film behind. It's just like drying paint, but for sticking.

Step 3

Step three: the film turns tough! The leftover film locks those tiny hills together, and it sets. Now the two sheets act like one! Wet becomes solid, and that's how glue works. Knowing the parts helps us understand the whole idea.

A Closer Look

Let's zoom in on a glue bond! The paper is made of tiny fibers. The wet glue flows between them. And when it dries, it becomes a strong film. Every part has an important job to do!

Quick Facts

Quick facts! Too much glue stays wet in the middle, and the page wrinkles. Smooth plastic needs a special glue, because it has fewer pores to grab. Cap the glue stick, so the tip doesn't dry into a crust. Use school glue only, and never taste it. Wash your hands afterward. Wow, those are some amazing facts to share with your friends!

Think Like a Scientist

Now, think like a scientist! Glue two paper scraps and two shiny plastic scraps with school glue, with a grown-up nearby. Which pair peels apart first when dry? What did the paper pores add? Write down what you notice! Scientists always write down what they see. Have fun! Then share what you found with a friend or a grown-up.

Outro

Glue turns from wet to tough to hold things together! Keep on wondering! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!