Scientists Say

A weekly word defined, in a sentence and in context.

  1. Earth

    Scientists Say: Jet Stream

    You might hear about the jet stream on a weather report, but what is it? We explain.

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  2. Plants

    Scientists Say: Xylem

    How do trees ferry water from the soil to branches hundreds of feet in the air? This week’s word is the answer.

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  3. Materials Science

    Scientists Say: Kevlar

    Many people hear Kevlar and think of body armor. But this polymer is in so much more.

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  4. Plants

    Scientists Say: Urushiol

    Poison ivy looks harmless, but its oil, urushiol, is not. This is the plant’s oil that leaves an itchy rash or blisters on your skin.

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  5. Health & Medicine

    Scientists Say: Virulence

    The virulence of a germ is a measure of its potential to cause disease.

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  6. Physics

    Scientists Say: Quantum

    Quantum seems like a very complex word. But really, it’s a term used for something very, very small.

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  7. Physics

    Scientists Say: Viscosity

    We know some liquids are thick and some are thin. This week’s word describes the property of these liquids to resist tension or pressure.

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  8. Physics

    Scientists Say: Torque

    Some forces pull and some push. This force produces turning or twisting.

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  9. Science & Society

    Scientists Say: Social

    Social is a single word used in many ways. But whether it’s social media or social order, social describes how we interact.

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  10. Genetics

    Scientists Say: Loci

    The DNA in our bodies contains thousands of genes, all with different functions. We use a special word for their location.

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