Daily Archives: December 27, 2017

Metals Wordsearch - Solved
Wordsearch puzzles are a fun way to introduce glossary terms of a subject. This metals wordsearch contains 24 different metals. Each metal could be found vertically, horizontally, or diagonally. The puzzle is optimized to fit on a standard 8.5″x11″ sheet of paper. Download links: [Metals Wordsearch Image] [Metals Wordsearch PDF] […]

Metals Wordsearch Puzzle

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Tapputi-Belatekallim, a female chemist and perfume maker, is mentioned on a Mesopotamian tablet from around 1200 B.C.E.
The first known chemist was a woman. A Mesopotamian cuneiform tablet from the second millennium B.C. describes Tapputi, a perfumer and palace overseer who distilled the essences of flowers and other aromatic materials, filtered them, added water and returned them to the still several times until she got just what she […]

Who Was the First Chemist? A Woman Named Tapputi

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Francesco Maria Grimaldi
December 28 marks the passing of Johannes Rydberg. Rydberg was a Swedish physicist who discovered an empirical mathematical formula to predict the wavelengths of light emitted by hydrogen atoms. He noticed the wavenumbers, or inverse of wavelength, of the spectral lines, were proportional to a difference of integer values. He […]

Today in Science History – December 28 – Johannes Rydberg   Recently updated !

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Broken Glass (Ivan Vranić)
Fact or fiction? You can shatter a glass using just your voice. This is a fact. If you generate a sound with your voice or an instrument that matches the resonant frequency of the glass, you produce constructive interference, increasing the vibration of the glass. When the vibration exceeds the […]

How to Break Glass With Your Voice

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