HS-LS1-7

Use a model to illustrate that cellular respiration is a chemical process whereby the bonds of food molecules and oxygen molecules are broken and the bonds in new compounds are formed resulting in a net transfer of energy.

More Stories in HS-LS1-7

  1. Plants

    Some redwood leaves make food while others drink water

    The two types of leaves grow at different heights in trees at dry versus wet areas. They may help redwoods adapt to climate change.

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  2. Animals

    La nutria soporta el frío, sin un cuerpo grande ni capa de grasa

    Al mamífero más pequeño del mar no le es fácil mantenerse caliente. Ahora, los científicos han descubierto cómo sus células responden al desafío.

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  3. Environment

    Recycling a climate-warming gas could make ‘greener’ farmed fish

    Instead of warming the climate, methane gas can be collected to help farmers. Along the way, it may also save some fish.

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  4. Animals

    Here’s how sea otters stay warm without blubber or a large body

    For the smallest mammal in the ocean, staying warm is tough. Now, scientists have figured out how the animals’ cells rise to the challenge.

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  5. Earth

    ‘Tree farts’ make up about a fifth of greenhouse gases from ghost forests

    Heat-trapping gases from dead trees play an important role in the environmental impact of “ghost” forests.

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  6. Health & Medicine

    Cool Jobs: Saliva offers a spitting image of our health

    Scientists are using this secretion to study our body’s functions, to test for disease and even to diagnose injury.

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  7. Microbes

    Several plant-like algae can morph into animal-like predators

    Single-celled green algae swim through water as free cells. Most use only photosynthesis for their energy. But not all of them, a new study shows.

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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. Scientists Say: Respiration

    Breathe in and out, that’s respiration. Have a cell break down sugars for energy, and that’s respiration too.

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