HS-LS4-5

Evaluate the evidence supporting claims that changes in environmental conditions may result in: (1) increases in the number of individuals of some species, (2) the emergence of new species over time, and (3) the extinction of other species.

More Stories in HS-LS4-5

  1. Climate

    Concerns about Earth’s fever

    Burning fossil fuels is causing the planet to heat up, causing weather patterns to change, sea levels to rise and diseases to spread.

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  2. Fossils

    Clues to the Great Dying

    Millions of years ago, nearly all life on Earth vanished. Scientists are now starting to figure out what happened.

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  3. Health & Medicine

    Chikungunya wings its way north — on mosquitoes

    A mosquito-borne virus once found only in the tropics has adapted to survive in mosquitoes in cooler places, such as Europe and North America.

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  4. Fossils

    Scientists Say: Coprolite

    Every living thing and signs of its existence — right down to their wastes — can fossilize under the right conditions. When poop fossilizes, it gets a special name.

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  5. Fossils

    Dino double whammy

    Most scientists think an asteroid helped kill off the dinosaurs. But new calculations suggest that asteroid might have gotten some help from a long series of volcanic eruptions in what is now India.

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  6. Fossils

    Tar pit clues provide ice age news

    New analyses of insects and mammals trapped in the La Brea Tar Pits point to climate surprises during the last ice age.

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  7. Earth

    How people have been shaping the Earth

    We are the dominant force of change on Earth. Some experts propose naming our current time period the ‘Anthropocene’ to reflect our impact.

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