Why Does the Moon Change Shape?
Koko learns the moon stays round but looks different as we see various lit-up parts.
About this story
Koko learns the moon stays round but looks different as we see various lit-up parts.
What you'll learn
- The moon doesn't change shape
- We see different parts lit by the sun
- Observing the night sky
Owlo, last night I looked out my window and saw the moon. It was round and bright like a big cookie.
That sounds beautiful, Koko. The full moon is wonderful to see.
But the night before, it looked different. It was skinny like a banana. Does the moon change shape?
What a smart question, Koko. Many children wonder about that. The moon does not really change shape at all.
It does not? But I saw it change with my own eyes.
I know it looks that way. Come with me to the science lab. I want to show you something special.
Look at this orange ball. This will be our pretend moon. Can you hold it for me?
Okay! It is nice and round, just like the real moon.
Perfect. Now I will turn off the lights. Do not worry, I have a flashlight here.
Ooh, it is dark in here now.
Good. Now I will shine the flashlight on one side of your orange ball. What do you see?
I can see the bright side where the light hits. But the other side is dark and hard to see.
Exactly right. Now walk slowly around me in a circle. Keep holding the ball.
Okay, I am walking around you now.
Do you see how different parts of the ball look bright as you move?
Yes! Sometimes I see the whole bright side. Sometimes I only see a little bright part on the edge.
That is exactly what happens with the real moon. The sun shines on it like my flashlight.
As the moon moves around Earth, we see different parts that are lit up by the sun.
So the moon is always round like my ball?
Yes, always. We just see different bright parts at different times. That makes it look like different shapes.
Oh! So when I saw the banana moon, I was only seeing a little bit of the bright part?
Exactly right, Koko. You are thinking like a real scientist now.
This is so cool. Can we turn the lights back on now?
Of course. Now, can you tell me what you learned today about the moon?
The moon does not really change shape. It is always round like this orange ball.
But the sun shines on it, and we see different bright parts as it moves. That makes it look like different shapes.
Tonight I will look out my window again. I want to see what shape the bright part is.
That is wonderful, Koko. You can look at the moon every night and watch it change. Maybe you can draw pictures of what you see.
I will do that. And I will show my drawings to you next time. Thank you for teaching me about the moon, Owlo.
You are very welcome, Koko. I love your curious questions. Keep looking up at the sky.
