HS-LS2-2

Use mathematical representations to support and revise explanations based on evidence about factors affecting biodiversity and populations in ecosystems of different scales.

More Stories in HS-LS2-2

  1. Animals

    Most species of beetles pee differently than other insects

    Scientists uncover their unique system for balancing ions and water. The findings may hint at why beetles are the most diverse animals on Earth.

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  2. Environment

    Pond scum can release a paralyzing pollutant into the air

    New study finds blooms of blue-green algae can seed the air with a poisonous pollutant.

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  3. Earth

    Only 3 percent of Earth’s land is unchanged by people

    A sweeping survey of land-based ecosystems finds that very few still support all the animals they used to. Reintroducing lost species could help.

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  4. Ecosystems

    Analyze This: Invasive species cost the world billions each year

    A new study estimates that invasive species have cost the world more than $1 trillion since 1970. That’s almost certainly an underestimate.

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  5. Animals

    How bees play telephone to form a swarm

    Honeybees use pheromones and flapping wings to tell each other where to find the queen — so they can all be together.

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  6. Ecosystems

    Urchin takeover underlies California’s vanishing kelp forests

    Some 95 percent of kelp forests along its northern coast are gone. Meanwhile, sea otters are helping slow the loss of surviving kelp farther south.

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  7. Health & Medicine

    Urban pollution can pose unseen risks to kids’ immunity and more

    A trio of new studies links immune changes and high blood pressure to inhaling bad air.

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  8. Animals

    Analyze This: Cows burp less methane after early-life treatment

    Calves that receive the 14-week treatment belch less of the greenhouse gas, possibly due to shifts in their gut microbes.

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  9. Plants

    Scientists may have finally found how catnip repels insects

    The plant deters mosquitoes and fruit flies by triggering a chemical receptor that, in some animals, senses pain and itch.

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