Silica dioxide

Silica dioxide is a very small thing that you can find in some rocks, sand, and even in some food like bananas. It looks like tiny sand grains and can be white or gray. It's made up of two things called silicon and oxygen, which are really tiny atoms that come together to make a new thing called silica dioxide.

Silica dioxide can be used for lots of things, like making glass or even toothpaste! Some people use it to help keep their teeth clean and shiny. It's also used in some medicines to help them work better.

Even though it might seem like just little grains of sand, silica dioxide is actually really important for lots of different things. So, next time you go to the beach or eat a banana, remember that little grains of silica dioxide might be hiding in there!