見えないのに、木をゆらしたり、洗たくものをゆらしたりする「風」。
左にしつもん、右にこども向けのせつめいで、風の正体をやさしく学べます。
We can’t see the wind, but it moves trees and laundry on the line.
Questions on the left, kid-friendly answers on the right, to learn what wind really is.
🍃見えない力Invisible power🧭風の向きWind direction🌪つよい風Strong wind🏃からだで感じるFeel with your body
1QUESTION
風って、いったい何なの？What is wind, really?
見えないのに、たしかにあるもの。We can’t see it, but we can feel it.
この空気の出たり入ったりが、風の流れ。
地球じゅうのいろんな場所で、あたたかさや冷たさがちがうから、
いつもどこかで風が生まれているんだ。
Air that the sun warms up becomes lighter and rises.
Then cooler air from around it moves in to take its place.
This in-and-out movement of air is the flow of wind.
Because places on Earth have different warmth and coldness,
wind is being born somewhere all the time.
🔥ストーブの近くや、ひなた・日かげで、空気のあたたかさのちがいを手で感じてみよう。Use your hand to feel the difference between warm air near a heater or in the sun and cooler air in the shade.
3QUESTION
「南風」「北風」って、何がちがうの？What’s the difference between a south wind and a north wind?
天気予報に出てくる「○○風」。We often hear “○○ wind” on the weather forecast.
つまり、「南風」は南からやってきた風ってことなんだ。
Wind names tell us which direction the wind comes from.
If wind blows from the south toward the north, it’s a “south wind.”
If it blows from the north toward the south, it’s a “north wind.”
So “south wind” means wind that came from the south.
🧭コンパスや地図を見ながら、どの方向から風が来ているか当ててみよう。Using a compass or map, try to guess which direction today’s wind is coming from.
4QUESTION
春風や秋風って、どうして季節でちがうの？Why do spring winds and autumn winds feel different?
その空気の動きが、春らしい風・秋らしい風をつくっているんだ。
In each season, warm and cold places on Earth are different.
In spring, warm air often comes from the south.
In autumn, cool air often comes from the north.
These movements of air make the spring-like and autumn-like winds.
🍃同じ公園でも、春と秋で「風のにおい」がちがうか、かいでみるのもおもしろいよ。In the same park, smell the air in spring and in autumn. Does the “scent of the wind” change?
5QUESTION
台風の風は、どうしてとても強いの？Why is wind in a typhoon so strong?
ふつうの風とはくらべものにならない強さ。It’s much stronger than normal wind.
その結果、ものすごく強い風が生まれるんだ。
台風の日は、風さんも全力ダッシュ中なんだね。
Around a typhoon, the difference in air pressure becomes very big.
Air tries hard to move from places with higher pressure to places with lower pressure.
This creates very strong winds.
On a typhoon day, it’s like the wind is running at full speed.
⚠️台風のときは外に出ず、窓から木のゆれ方や雲の速さを安全な場所から観察してみよう。During a typhoon, don’t go outside. Watch the trees and clouds from a safe place indoors.
6QUESTION
ビルのあいだや角で、急に風が強くなるのはなぜ？Why does the wind suddenly get strong between buildings or at corners?
「ビル風（かぜ）」ってよばれることもあるね。This is sometimes called “building wind.”
川の水も、せまいところでは速く流れるよね。
それと、考えかたは少しにているよ。
When tall buildings stand close together, the path for air becomes narrow.
As air passes through the narrow place, it is squeezed and speeds up.
River water also flows faster in narrow parts of the river.
Wind between buildings is a bit like that.
🏙️角を曲がるときに、風のつよさが急に変わる場所がないか、気をつけながら歩いてみよう。When walking in town, notice if the wind suddenly gets stronger when you turn a corner.
7QUESTION
風があると、どうして体が冷たく感じるの？Why do we feel colder when the wind blows?
同じ気温でも、風がふくと寒くなるのはなぜ？Even at the same temperature, wind makes us feel colder.
だから、同じ気温でも、風があると体からうばわれるあたたかさの量が増えて、
より寒く感じるんだ。
Your body warms the air close to your skin.
When wind blows, this warm air is quickly taken away.
Then new, cooler air keeps touching your body again and again.
So even at the same temperature, more heat leaves your body when it’s windy,
and you feel colder.
🧥自転車に乗るとき、止まっているときと走っているときで、顔の寒さをくらべてみよう。On a bicycle, compare how your face feels when you stop and when you ride fast.
8QUESTION
風の音って、何の音？What is the sound of wind?
ヒューヒュー、ゴーゴーと聞こえる音の正体。What makes the “whooo” or “gooo” sounds we call wind?
木の葉っぱ、竹、マンションのすきま…
どこを通るかで風の「声」も変わるんだね。
Wind itself really has no sound.
But when it hits trees, houses, wires, or gaps,
those things shake and vibrate and make sound.
Leaves, bamboo, gaps in buildings…
depending on where it passes, the “voice” of the wind changes.
👂風の強い日に、窓を少しだけ開けて、どんな音が聞こえるか耳をすませてみよう。On a windy day, open the window a little and listen carefully. What different wind sounds can you hear?
9QUESTION
ほかに、風についてどんな「なぜ？」があるかな？What other “whys” about wind can you think of?
自分の町の「風マップ」を作ってみよう。Let’s make your own “wind map” of your town.
IDEAS
たとえば、こんな「なぜ？」もあるよ：
海の近くの風と、山の近くの風はどうちがうの？
風鈴は、どれくらいの強さの風で鳴るの？
たこあげにちょうどいい風って、どんな風？
ビルの上と地上では、風の強さはどれくらい違うの？
Here are some idea questions:
How is wind near the sea different from wind near the mountains?
How strong must the wind be to ring a wind chime?
What kind of wind is just right for flying a kite?
How different is the wind on top of a tall building from at the ground?
📝公園・川・校庭など、場所ごとに「風の感じ」をメモして、自分だけの風マップを作ってみよう。Write down how the wind feels in the park, by the river, or in the schoolyard and make your own wind map.