HS-PS1-2

Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.

More Stories in HS-PS1-2

  1. Chemistry

    Explainer: What are acids and bases?

    These chemistry terms tell us if a molecule is more likely to give up a proton or pick up a new one.

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  2. Climate

    Explainer: The making of a snowflake

    Have you ever wondered how a snowflake gets its shape?

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  3. Earth

    Explainer: Why sea levels aren’t rising at the same rate globally

    The ocean is rising all over the world. The rise seems speedier in some places. What gives? Many factors, it turns out, affect where — and why — the tide gets high.

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  4. Chemistry

    Explainer: CO2 and other greenhouse gases

    Carbon dioxide is just one of several chemicals that contribute to the greenhouse effect. Nitrous oxide, methane and CFCs are other big contributors.

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  5. Animals

    Cool Jobs: A world aglow

    Three scientists probe how the natural world makes light, in hopes of using this information to design new and better products.

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  6. 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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  7. Tech

    How to spin synthetic spider silk

    A new method for spinning artificial spider silk combines parts of proteins from two species and mimics what happens in a spider’s silk-forming gland.

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