【Wait, really? A cup rainwater experiment you can do because it's the rainy season!】 〜Let's compare a cup of water and rainwater〜

A rainy day.
You were planning to go out, but then you couldn't, and you felt disappointed...
You've felt that way before, haven't you?

But you know, there are some "discoveries" you can only make on a rainy day.

Today, I'll let you in on one of them.

🟦 Chapter 1: Touching the water and noticing things.

First, here's a simple preparation you can do at home.
1. Get two cups ready.
2. Put one outside to collect rainwater.
3. Put tap water in the other one.

Then, gently put your finger into both waters.
"Which one is colder?" "How does it feel?"

Surprisingly, many people feel that "the rainwater is colder!"

🟦 Chapter 2: Why is rainwater cold?

Rain falls from way up in the sky.
It is much colder high up in the sky than it is on the ground.
During that time, the water gets chilled and reaches us.

On the other hand, tap water comes from underground or has been stored.
Since it's kept inside the house, it gradually adjusts to the room temperature.

That's why even though they are both "water," they feel different when you touch them.

🟦 Chapter 3: It's amazing what you can discover with your hands.

Even without a thermometer or any special tools,
there are things you can notice just by "touching."
A rainy day might be a chance for such a discovery.

🟦 Let's investigate!

If you want to know more, let's look at the changes in the weather hour by hour.
You can check the state of the rain and weather maps on the following sites.

(⚠️ Only open these sites when you are with an adult)

🔹 Japan Weather Map

🔹 World Weather Map

☂️ On a rainy day when you can't go out,
try to really feel the water from the sky.
There is surely "something" hidden in that single drop.

Children's Newspaper Yuko Fukami
As of June 4, 2025

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