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🕸️ Food Webs and Interdependence

See how food chains weave into food webs, why living things depend on one another, and how removing a single species can ripple through a whole ecosystem.

lessons

~15 min

to learn

🔬 Science

subject

Ages 6–12

level

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What you’ll learn

From Chains to WebsExplain how food chains combine into food webs, including decomposers.A food chain shows one path of energy, but real ecosystems have many. A food web links many chains together, with arrows pointing from food to feeder. Food webs include producers, consumers, and decomposers, which return nutrients to the soil so the web keeps going.
Everything Is ConnectedDescribe interdependence and relationships like predation, competition, and partnership.Interdependence means living things depend on one another. In a food web they connect as predators and prey, as competitors for the same food, as partners like bees and flowers, and through decomposers. Because of these ties, a change to one member can affect many.
When the Web ChangesExplain ripple effects and identify keystone species using the sea otter.Because food webs are so connected, removing one species can ripple outward and shift the balance. A keystone species holds an ecosystem together: sea otters eat sea urchins, keeping kelp forests healthy for many creatures. Lose the otters, and urchins can strip the kelp bare.

Questions this course answers

What is a food web?

A food web is many food chains linked together, showing all the feeding connections in an ecosystem.

Why do decomposers belong in a food web?

Decomposers break down dead matter and return nutrients to the soil so producers can grow again.

What does interdependence mean?

Interdependence means living things depend on one another, like a bee and a flower.

When foxes and owls both hunt mice, they are showing what kind of relationship?

Foxes and owls compete because they want the same food, mice.

Why can removing one species ripple through a whole food web?

Because a food web is so interconnected, a change to one species can shift the balance of many others.

What is a keystone species, like the sea otter?

A keystone species holds its ecosystem together; the sea otter keeps urchins in check so kelp forests thrive.

Grounded in trusted sources

National Geographic Kids
Smithsonian's National Museum of Natural History
Britannica Kids
Khan Academy

Every Wunder lesson is built from real, reputable sources — never invented.

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