HS-LS2-4

Use a mathematical representation to support claims for the cycling of matter and flow of energy among organisms in an ecosystem.

  1. Plants

    Using plants to solve environmental problems

    Problems in their communities suggested good research projects to three teens. Each wanted to tackle a different issue, from pollution to world hunger. To learn more about these issues, they turned to their local ponds, wetlands and gardens.

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  2. Ecosystems

    Scientists Say: Taphonomy

    Studying what happens to plants and animals after they die can teach us about ecosystems and evolution. This study has a special name.

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  3. Plants

    Picture This: The world’s biggest seed

    This monster seed develops on a super-slow-growing island palm. Key to that palm’s survival are leaves that funnel fertilized water to nutrient-starved roots.

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  4. Animals

    Pesticides offer bees a risky allure

    Honeybees and bumblebees sometimes cannot taste or avoid pesticides called neonicotinoids. And that may expose some of these important pollinators to harm.

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  5. Animals

    What’s the buzz? A new mosquito lure

    Broadcasting a fake buzz can lure male Aedes aegypti mosquitoes away from females. That could reduce populations of these annoying — and disease-causing — insects, reports a teen at the 2015 Intel ISEF competition.

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  6. Animals

    What’s for dinner? Mom.

    Female spiders of one species make the ultimate sacrifice when raising their young: The mothers feed themselves to their children.

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  7. Microbes

    Ongoing Ebola outbreak traced to hollow tree

    Scientists suspect the current Ebola outbreak started with bats that lived in a hollow tree in Guinea. The outbreak's first victim, a two-year-old boy, often played in the tree.

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  8. 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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  9. Microbes

    Recycling the dead

    When things die, nature breaks them down through a process we know as rot. Without it, none of us would be here. Now, scientists are trying to better understand it so that they can use rot — preserving its role in feeding all living things.

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  10. Environment

    Native ‘snot’

    The ‘rock snot’ choking rivers may be native algae. Experts blame its sudden and dramatic emergence on changes in Earth’s atmosphere, soils and climate.

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