Scientists Say

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

  1. Earth

    Scientists Say: Meteorology

    This word describes the study of processes in the Earth’s atmosphere, including the weather.

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  2. Space

    Scientists Say: Light-year

    This is the distance light travels in one year — about 9.48 trillion kilometers. Light-years are used to measure vast distances, like those in space.

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  3. Life

    Scientists Say: Fermentation

    Fermentation breaks down carbohydrates, such as sugars, producing energy and making gases, acids or alcohol. This process can help make foods and fuels.

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  4. Fossils

    Scientists Say: Fossil

    Under the right conditions, living things or traces they’ve left behind can be preserved in rock for a long time — millions or billions of years.

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  5. Space

    Scientists Say: Gas giant

    These gargantuan planets, such as Jupiter and Saturn, are mostly made up of hydrogen and helium gas.

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  6. Earth

    Scientists Say: Glacier

    Glaciers are massive ‘rivers of ice’ that move slowly over land. But climate change is shrinking them.

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  7. Health & Medicine

    Scientists Say: Outbreak, Epidemic and Pandemic

    These terms can describe what is happening as a disease spreads across communities, countries and the world.

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  8. Physics

    Scientists Say: Decibel

    A decibel is a unit of measurement that describes a sound’s volume. It’s used for sounds that are in the range of human hearing.

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  9. Ecosystems

    Scientists Say: Estuary

    This is where a freshwater river meets a salty sea. This environment has brackish water, a mix of saltwater and freshwater.

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  10. Physics

    Scientists Say: Quark

    These subatomic particles are the building blocks of bigger particles, including the protons and neutrons found in an atom’s nucleus.

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