HS-PS1-8

Develop models to illustrate the changes in the composition of the nucleus of the atom and the energy released during the processes of fission, fusion, and radioactive decay.

  1. Chemistry

    Dwarf galaxy spawned heavy elements

    A study of nine stars in the dwarf galaxy Reticulum II found heavy elements. They had been produced after a violent stellar event sparked a chemical chain reaction.

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  2. Earth

    When life exploded

    Life exploded in diversity during the Cambrian Period. Experts are exploring what could account for this sudden change 540 million years ago.

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  3. Chemistry

    Scientists confirm element 117

    Scientists have confirmed the existence of a new, short-lived superheavy element. For now, they’re calling it ununseptium.

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  4. Animals

    We are stardust

    Everything making up Earth and what’s now living upon it — from trees and people to our pets and their fleas — owes their origins to the elements forged by ancient stars.

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  5. Physics

    Closing in on fusion energy

    Scientists blasted a tiny capsule of hydrogen with laser beams, setting off a reaction that released more energy than in earlier experiments. Still, scientists remain a long way from creating a reaction that releases more energy than it needs to get started.

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  6. Kids’ ingenuity honored at Intel ISEF

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  7. Space

    A curious cosmic explosion

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  8. Earth

    Quake leaves destruction, fear

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  9. Space

    Burst busters

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