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. Archaeology

    Our species may have reached Europe while Neandertals were there

    Archaeological finds from an ancient French rock-shelter show periodic settlements by both populations, just not at the same time.

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  2. Animals

    As the tropics warm, some birds are shrinking

    Migratory birds are getting smaller as temperatures climb, studies had showed. New evidence shows dozens of tropical, nonmigratory species are, too.

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  3. Life

    Scientists Say: Adaptation

    This word refers to a feature of a living thing that helps it better survive in its environment — or the process of that feature evolving in a population.

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  4. Fossils

    ‘Penis worms’ could have been the original hermits

    These soft-bodied critters lived in abandoned shells about 500 million years ago, a new study suggests.

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  5. Earth

    Explainer: The age of dinosaurs

    Take a trip back to the Mesozoic Era to explore how geologic events, ecosystems and evolution were connected during the so-called age of dinosaurs.

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  6. Animals

    Cloning boosts endangered black-footed ferrets

    A cloned ferret named Elizabeth Ann brings genetic diversity to a species that nearly went extinct in the 1980s.

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  7. Fossils

    Dinosaur families appear to have lived in the Arctic year-round

    Fossils of baby dinosaurs in northern Alaska challenge the idea that northern dinosaurs only spent their summers in the high Arctic.

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  8. Animals

    Let’s learn about whales and dolphins

    Whales, dolphins and porpoises are all cetaceans — mammals that live in water and have a streamlined body similar to a fish.

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  9. Plants

    Dinosaur-killing asteroid radically changed Earth’s tropical forests

    The asteroid collision initially reduced the diversity in what had been sunny tropical rainforests. In time, the forests would become permanently darker.

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