Koko:
Owlo! Owlo! I have the most important question in the whole world today.
Owlo:
Well, come on in, Koko. You look like you ran all the way here from home.
Koko:
I did! I was lying in the garden this morning, looking up at the sky. And I saw the biggest, fluffiest cloud ever.
Owlo:
Oh, I love a good cloud-watching morning. What did it look like?
Koko:
It looked exactly like a giant scoop of ice cream. But then I started thinking... what even IS a cloud? What is it made of?
Owlo:
What a wonderful thing to wonder about, Koko. I think we need the science lab for this one.
Koko:
Yes! Can we use the big magnifying glass too?
Owlo:
Even better. I know just the experiment to show you. Follow me.
Owlo:
Okay, Koko. First, I want you to breathe out slowly onto this cold mirror. Tell me what you see.
Koko:
Whoa! It went all foggy and misty. There are tiny little drops on it!
Owlo:
Exactly! Those tiny drops are water. They came right out of your warm breath. Now, clouds are made of something very similar.
Koko:
Wait... clouds are made of my breath?
Owlo:
Not exactly your breath, but the same idea. Clouds are made of millions and millions of tiny water droplets.
Koko:
Millions? That is SO many drops. Where do they all come from?
Owlo:
It all starts with water on the ground. Think about puddles, rivers, and the big ocean. The sun warms that water up.
Koko:
And then what happens? Does the water just fly up?
Owlo:
In a way, yes! When water gets warm enough, it turns into an invisible gas called water vapor. That vapor floats up into the sky.
Koko:
Invisible? So there is invisible water floating around us right now?
Owlo:
There is, actually. You cannot see it, but it is there. Up high in the sky, the air is much colder.
Koko:
And then the invisible water gets cold and turns back into drops?
Owlo:
You are thinking like a real scientist, Koko. Yes! The cold air turns the vapor back into tiny water droplets. Those droplets cling to tiny dust specks in the sky.
Koko:
Dust? There is dust way up in the sky?
Owlo:
Tiny, tiny bits. And when millions of those little droplets gather together around dust, they form a cloud.
Owlo:
So a cloud is really just a big crowd of water droplets, floating together up high.
Koko:
That is so cool. Clouds look so soft and fluffy, but they are actually made of water. I want to touch one so much.
Owlo:
You know what? You actually have touched one before. Have you ever walked through thick fog on a chilly morning?
Koko:
Yes! It felt all wet and misty on my fur. I did not like it very much.
Owlo:
Well, fog is just a cloud that is sitting very low, right on the ground. So you have already been inside a cloud.
Koko:
No way! I walked through a cloud and did not even know it. That is the best thing I have ever heard.
Koko:
So fog is a ground cloud. I am going to tell everyone that.
Owlo:
That is a perfect way to put it. Now, Koko, can you tell me what you learned today about clouds?
Koko:
Okay! So clouds are made of millions of tiny water droplets. The sun warms up water from puddles and rivers and oceans. The water turns into invisible gas called water vapor and floats up high.
Koko:
Then the cold air up there turns it back into tiny drops. Those drops stick to little bits of dust and all bunch together to make a cloud. Oh, and fog is just a cloud chilling on the ground.
Owlo:
That is a perfect summary, Koko. I could not have said it better myself.
Koko:
Next time I want to find out why some clouds are dark and rainy and some are bright and white. And also why they are different shapes.
Owlo:
Now that, my curious little fox, is a question worth saving for next time.