Graphite

carbon · electricity · materials

Pencils contain graphite. The dark stuff in pencil tips is actually graphite, not lead. Graphite is soft and leaves marks on paper, which is why pencils have been used for writing for hundreds of years.

Conducts electricity and heat. Graphite is special because it lets electricity and heat move through it really well. This makes it super useful in batteries, electronics, and things that need to stay cool even when they get hot.

Made of stacked layers. If you zoomed in with a super powerful microscope, you would see that graphite is like a stack of paper-thin sheets of carbon all piled on top of each other. These layers can slide apart easily, which is why graphite feels slippery.

Can turn into diamond. When you squeeze graphite under enormous pressure and heat it way up, the carbon atoms rearrange and turn it into diamond. Both diamonds and graphite are made of the same element, just arranged differently.

Powers modern batteries. Graphite is used in lithium-ion batteries that power phones, laptops, and electric cars. These batteries use graphite because it lets electrical charges move through it super efficiently.