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2026年2月5日 / Last updated : 2026年2月5日 桑子 研 Science

From Circles to Waves? Exploring the Mysterious Beauty of Sine Waves with Scratch (Physics & Math Learning Tool)

I am Ken Kuwako, a Science Trainer. Every day is an experiment. Circles and Waves. When you hear these two words, what shapes do you imagine? One might be the looping silhouette of a Ferris wheel, while the other is a rhythmic wall of water rolling across the ocean. At first glance, they seem like […]

2026年2月4日 / Last updated : 2026年2月4日 桑子 研 Science

Explosive Chemistry in Action! Learn Redox and Heat Through the Thermite Reaction (Aluminum Steals Oxygen!)

I am Ken Kuwako, your Science Trainer. Every day is an experiment. [This article is also available on our radio show!] A blinding flash ignites before your eyes, and in a split second, iron melts into a glowing liquid… Doesn’t that sound thrilling? Today, I want to introduce you to an experiment called the Thermite […]

2026年2月3日 / Last updated : 2026年2月3日 桑子 研 Science

From Umbrella Bags to Magic Threads! The Secret of Optical Fibers Revealed in an Instant — Total Internal Reflection Experiment

I am Ken Kuwako, your science trainer. Every day is an experiment! In my last post, we used a simple umbrella bag to explore “light scattering”—the reason why the sky is blue and sunsets are red. Today, let’s dive into the secrets of fiber optics, the massive infrastructure that powers our modern world! What exactly […]

2026年2月2日 / Last updated : 2026年2月2日 桑子 研 Science

Hear the Siren Shift! Recreate the Changing Sound of an Ambulance with Your Smartphone (The Doppler Effect)

I am Ken Kuwako, your science trainer. Every day is an experiment. Back to the Special Page Have you ever noticed how an ambulance racing toward you with a high-pitched “Nee-naw!” suddenly shifts to a low, weary-sounding moan the moment it passes you? It almost feels like the ambulance lost its motivation halfway through, but […]

2026年2月1日 / Last updated : 2026年2月1日 桑子 研 Science

Frozen in a Flash! Why Water Instantly Turns to Ice with a Tiny Shock — The Secret of Supercooling

I am Ken Kuwako, your Science Trainer. Every day is an experiment! “What if the liquid in front of you froze instantly, like magic?” Have you ever witnessed such a breathtaking sight? Transparent water transforming into crystals at the touch of a finger, as if time itself had stopped. In our science club, we took […]

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運営:桑子研(くわこ けん)
科学の楽しさや不思議、感動を多くの人に届けていきたい。サイエンストレーナーとしてテレビ番組の科学監修・出演、実験教室、科学本執筆なども行っています。

Author: Ken Kuwako
My mission is to share the joy, wonder, and excitement of science with as many people as possible. As a Science Trainer, I stay busy supervising and appearing on science-themed TV programs, hosting hands-on experiment workshops, and authoring science books.

Recent posts

Make Your Own Straw Wind Instrument with Kids! Snip, Snip—Why Does Cutting It Make the Sound Higher?

2026年2月15日

Why Does an Ambulance Sound Change? Uncover the Doppler Effect with Scratch!

2026年2月14日

Secrets of Static Electricity! Try This Cool Experiment with Styrofoam and Paper Bits (Dielectric Polarization)

2026年2月13日

Make It Snow in a Test Tube! Sparkling Crystal Christmas at Home (Ammonium Chloride Recrystallization Experiment)

2026年2月12日

Where Did the Electricity Go? Uncover the Emotional “V-Shaped Graph” of Neutralization! (Barium Hydroxide × Sulfuric Acid Experiment)

2026年2月11日

The Secret of Fizzy Reactions! Learn Chemical Changes with Citric Acid × Baking Soda (Endothermic Reaction)

2026年2月10日

Learn How Engines Work with a Shocking “Pop!” — The Secret of Alcohol Explosion Experiments (First Law of Thermodynamics)

2026年2月9日

What Happens When Acid Meets Base? Create the Crystals of Neutralization — A Visible Chemistry Drama (HCl & NaOH Experiment)

2026年2月8日

What Happens If You Jump on a 300 km/h Bullet Train? The Half Super Ball Experiment Explains It!

2026年2月7日

A Squeeze of Lemon Is a Chemistry Experiment! Your Dining Table Turns into a Science Lab (Neutralization)

2026年2月6日

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