MS-PS1-4

Develop a model that predicts and describes changes in particle motion, temperature, and state of a pure substance when thermal energy is added or removed.

  1. Health & Medicine

    Explainer: All about the calorie

    Calories are a measure of how much energy is in a food. But when it comes to powering our bodies, not all calories are equally available to the body.

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  2. Chemistry

    Explainer: What is a catalyst?

    Catalysts are used in manufacturing and many technologies. They’re also found in living things. They help chemical reactions move along.

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  3. Chemistry

    Here’s how hot water might freeze faster than cold

    There’s a new explanation for how hot water freezes faster than cold water. But not everyone agrees it’s right, or that the effect can happen at all.

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  4. Physics

    Weird physics warps nearby star’s light

    Scientists have observed a bizarre effect of quantum physics in light coming from a nearby neutron star.

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  5. Chemistry

    Scientists Say: Sublimation

    Matter doesn’t always go from solid to liquid to gas. Sometimes it skips a step.

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  6. Teen studies better cleaning through chemistry

    Why do we use hot water and soap to get things clean? To find out, a teen invented a way to measure surface tension.

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  7. Physics

    Scientists Say: Absolute zero

    Even when we think it’s cold out, most molecules are moving. Only at absolute zero will all of their motions stop.

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  8. Physics

    Sunlight + gold = steaming water (no boiling needed)

    Nano-gold is the new black, at least when it comes to absorbing heat. When tiny gold particles get together, they become energy super-absorbers — turning them black.

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  9. Earth

    Carbon dioxide could explain how geysers spout

    A new study overturns 150 years of thinking about Yellowstone’s geysers. Carbon dioxide, not just hot water, may be driving those spectacular eruptions.

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  10. Tech

    Cool Jobs: Big future for super small science

    Scientists using nanotechnology grow super-small but very useful tubes with walls no more than a few carbon atoms thick. Find out why as we meet three scientists behind this huge new movement in nanoscience.

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  11. Physics

    News Brief: As timely as it gets

    A newly modified atomic clock won’t lose or gain a second for 15 billion years. This timepiece is about three times more precise than an earlier version.

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  12. Physics

    How popcorn got its pop

    Popcorn is a popular treat. Now, scientists have learned exactly what happens as it pops. They also have come up with an experiment they hope you will try.

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