HS-PS1-5

Apply scientific principles and evidence to provide an explanation about the effects of changing the temperature or concentration of the reacting particles on the rate at which a reaction occurs.

More Stories in HS-PS1-5

  1. Chemistry

    Experiment: Keep your candy cool with the power of evaporation!

    In this science project, use the energy produced when water evaporates to cool down chocolate-covered candy so it doesn't melt.

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  2. Physics

    Explainer: What are the different states of matter?

    Most people know solids, liquids and gases — but what about the four other states of matter?

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  3. Animals

    Orb-weaving spiders use their webs like external eardrums

    Scientists discover that orb-weaving spiders listen with their legs, detecting sound vibrations that travel through their silken webs.

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  4. Chemistry

    Cellulose may keep ice cream from turning gritty in your freezer

    Adding nanocrystals extracted from wood avoids the growth of ice crystals, keeping your treat smooth and creamy.

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  5. Math

    Why some icicles become scallops not spikes

    The newfound — and at times quirky — shapes reflect the density of water surrounding submerged ice.

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  6. Chemistry

    Explainer: What are fats?

    A fat molecule's three long chains of carbon and hydrogen atoms repel water, stash energy and keep living things warm — even in the bitter cold.

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  7. Chemistry

    Study acid-base chemistry with at-home volcanoes

    Baking soda volcanoes are a fun demonstration, and with a few tweaks they can be an experiment, too

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  8. Physics

    The exotic ‘atom’ positronium surprises scientists

    New measurements of a weird but simple atom, one without a nucleus, suggest it may have unexpected properties. Scientists find this troubling.

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  9. Chemistry

    Build ice towers with bottled water and ice

    Pour out liquid water into a solid ice tower. We outline the conditions you’ll need to turn this demonstration into a super-cool experiment.

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