What makes them big and round?
Imagine you have a cookie, and you use a round cup to press into it, poof! You get a big round hole in the cookie, just like the one you might find on a pizza or a cake. These holes are often made by something round and strong, like a cookie cutter, a bite, or even a drill.
How do we use them?
Big round holes can be really useful! If you think of a donut, it's just a big round hole in the middle of a circle. Or imagine a wheel, if you take away the center part, that’s like a big round hole too. Even your ear has a little round hole called the ear canal, which helps you hear!
So next time you see something with a big round hole, think about what made it, and maybe try making one yourself!
Examples
- A giant hole left behind after a tree was removed from a park.
- A perfectly round hole made by a volcano erupting.
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See also
- What is sand?
- What is cliff?
- What are rises?
- Biomimicry has massive potential. Why aren't designers using it?
- Can a mountain turn into a volcano?