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

    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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  2. 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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  3. 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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  4. 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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  5. Chemistry

    This tube worm’s glowing slime may help sustain its own shine

    Snot oozed by a marine tube worm can glow for up to 3 full days. The secret of how this works might lead to long-lasting lights that glow on and on.

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  6. Tech

    COVID-19 victims could breathe easier with these innovations

    Feared equipment shortages due to the COVID-19 pandemic have prompted research teams to develop novel technologies to help oxygen-starved lungs.

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  7. Chemistry

    Rock Candy Science 2: No such thing as too much sugar

    Making rock candy at home takes a lot more sugar than you might think. Why? This experiment will show you why.

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  8. Chemistry

    Banana plant extract can slow how fast ice cream melts

    Food scientists now show that adding these tiny plant particles to ice cream may delay the rate at which this treat melts into a soupy mess.

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  9. Chemistry

    Scientists Say: Catalyst

    Sometimes a chemical reaction can take a while. If speed is needed, a catalyst can help.

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