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November 2025

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2025年11月9日 / Last updated : 2025年11月9日 桑子 研 Science

Is This Roadside Weed a Dicot or a Monocot? The Moment the Textbook “Rules” Fall Apart

I’m Ken Kuwako, Science Trainer. Every day is an experiment. “The Observation Lesson on Ribwort Plantain” – Dicot or Monocot? Exploring a Plant That Breaks the Rules of Classification! In middle school science, we learn the terms “dicotyledons (dicots)” and “monocotyledons (monocots).” Textbooks often present a neat way to classify them: “If it has two […]

2025年11月8日 / Last updated : 2025年11月8日 桑子 研 Science

The Science Teacher’s Secret Weapon: Cutting 5 Hours of Grading Down to 2 with Digital Systems

I’m Ken Kuwako, a Science Trainer. Every day is an experiment. [This article is also available on the radio!] While preparing for experiments and innovating in class are essential, grading tests to accurately measure each student’s comprehension is an equally critical task. Grading a large volume of answer sheets within a limited timeframe and then […]

2025年11月8日 / Last updated : 2026年9月20日 桑子 研 Science

One Wire, Ten Times the Power!? Feel a “30-Amp” Magnetic Field with the Pascal Cable (S-Cable)

I’m Ken Kuwako, a science trainer. Every day is an experiment. “Electricity” and “magnetism.” Do you remember learning about the “right-hand screw rule” and “Fleming’s left-hand rule” in school science? They’re familiar concepts from textbooks, but when you actually try the experiments, the compass needle may only twitch “a little,” or a wire may move […]

2025年11月8日 / Last updated : 2026年9月28日 桑子 研 Science

One Wire, Ten Times the Power?! Building the Ultimate Coil with the Magic ‘Pascal Wire’

Science trainer Ken Kuwako here. Every day is an experiment. At first glance, it’s just an ordinary wire. But what if that wire were secretly hiding the power of 10 wires in one? Doesn’t that sound exciting? The “Pascal Wire” is exactly that kind of magical item. Inside a single tube, 10 conductors are bundled […]

2025年11月8日 / Last updated : 2025年11月8日 桑子 研 Science

Why Is the Sky Blue and the Sunset Red? Discover the Secret with Soap Bubbles and a Plastic Bottle!

I’m Ken Kuwako, a Science Trainer. Every Day is an Experiment! “Why is the sky blue?” “If it’s blue, then why are sunsets red?” If you’re a science teacher (or maybe a parent), you’ve probably been asked these questions by a child at some point. While explaining “light scattering” using words and diagrams is certainly […]

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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.

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