Your pupils change size depending on how you are thinking
Humans 2.0From: Popular Science · rewritten for kids by Osmo
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The black dot in the middle of your eye is called the pupil. It can get bigger or smaller. Scientists found it changes when you count in your head.
Big word
dilate: To get wider or bigger, like your pupils do in the dark.
Quiz time: circle the right answer
1. What happened to people's pupils when they counted out loud?AThey got biggerBThey got smallerCThey changed colour
2. What did volunteers do in the experiment?ACounted out loud and silentlyBRan a raceCPainted pictures
3. Which country were the scientists from?AJapanBKenyaCPeru
Your turn
Ask a grown-up to watch your eyes in a mirror while a light is switched on and off. Draw your pupil when it is big and when it is small.
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