Grades 5-8 - Physical Science

  • Electric eye learns from animal eye!

    Lenses cannot project a perfect image on the flat back of a camera, so images are distorted at the edges. A revolutionary camera solves this problem by curving the light detector.


    Thursday, August 7th, 2008
  • Laser: The invention that just won’t quit!

    Lasers read and write CDs and DVDs, form the heart of fiber-optics, and are being used in climate prediction, chemical identification, high-tech manufacturing, even the battle against influenza.


    Thursday, July 17th, 2008
  • Dig the latest top tech tricks

    What you can’t see can still interest you. Archeologists use radar, magnetic, electrical gizmos to see through the ground, find places to dig.


    Thursday, June 5th, 2008
  • The sounds of sax

    New study shows that controlling throat shape helps pro players hit the high notes that elude amateurs.


    Thursday, February 7th, 2008
  • Big ideas from the smallest world

    New snowflake generator reveals nature’s design principles; anti-reflective coating is nearly perfect, and so is mother-of-pearl inside an abalone. Dive into the nitty gritty of the itty bitty!


    Thursday, January 31st, 2008
  • It’s snow-time! Dig into our all-flake, no fake feature!

    Frosty questions: Are some snowflakes identical? How do flakes form, and how does weather affect their shape? How does ice in the atmosphere affect weather and climate? And where does the jet stream fit in this picture?


    Thursday, December 27th, 2007
  • New plug-in hybrid claims 640 miles per tank
    New plug-in hybrid claims 640 miles per tank

    Plug-in hybrids mean more than just extra spending cash for drivers, though. They could offer a new path through the maze of the electric grid, and help to boost the use of alternative energy.


    Thursday, November 29th, 2007
  • The frets on a guitar neck are placed to produce the smallest interval on the chromatic scale: a half-step.
    Music and speech

    Most music is built on the 12-tone “chromatic” scale. Does this reflect chance, or the basic structure of the human voice? New study finds tight link between pronunciation and musical scale.


    Thursday, June 7th, 2007
  • Carbon Storage: A Low-Carb Solution to Global Warming?

    Could carbon storage help control warming? The oil industry already injects CO2 into deep rocks. Is it possible to capture CO2 from coal plants, and pump it deep underground?


    Thursday, March 22nd, 2007
  • Can Ethanol Replace Gasoline? Should it?

    Global warming gets worse. Petroleum grows scarce. Should we start making biofuels bigtime? If so, should we get the ethanol from corn, or from plant wastes?


    Thursday, February 8th, 2007


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