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food chains

Food Chain
Image: National Geographic/Ernie Aransi

Food Chain

The heron eats the fish that ate the smaller fish that ate an insect that ate a leaf that made its own food from sunlight. That's a food chain.

Every plant and animal is part of one — or more likely several. All living things need energy to survive, and this energy is transferred from one organism to another as food. It is the circle of life.

National Geographic
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How Wolves Change Rivers

How Wolves Change Rivers

Wolves have transformed the ecosystem and physical geography of Yellowstone. See how their presence caused changes in animal and plant populations, as well as the behavior of rivers. More...

Video
Sustainable Man
Bigger Food Chains

Bigger Food Chains

Explore this site to learn about the different parts of the food chain, then test your knowledge by playing the game at the end. More...

Article
Sheppard Software
Food Chains

Food Chains

Explore food chains and webs with Tim and Moby as they answer the question, "Are plants always at the bottom of the food chain?" More...

Video
BrainPOP
Quiz: Food Chains, Food Webs, and Energy Flow

Quiz: Food Chains, Food Webs, and Energy Flow

Check your understanding of food chains, food webs, and related vocabulary with this 10-question quiz. More...

Interactive
McGraw-Hill
Marine Food Chain

Marine Food Chain

Explore the four levels of the marine food chain — plants, herbivores, carnivores, top predators — to find out who rules in the "fish-eat-fish world." More...

Article
National Geographic
Toxic Materials in the Food Chain

Toxic Materials in the Food Chain

Sometimes there's more than energy flowing through a food chain. Toxic chemicals can also be passed from one consumer to the next, including humans. More...

Article
BBC
Alligator Habitat by Katelyn and Blake

Alligator Habitat by Katelyn and Blake

Join kid-scientists Katelyn and Blake in the swamps of Mississippi, as they prove that alligators need food and quiet and LOTS of mud. More...

Video
DragonflyTV/PBS
Build the Food Chain!

Build the Food Chain!

Build a food chain and then find out what happens when one link in the chain is removed. Hint: It's not good! More...

Game
Earth Day Canada
Kelly Benoit-Bird

Kelly Benoit-Bird

Meet a marine biologist who uses sound and acoustics to study how animals in the ocean "find their food while trying to avoid becoming someone else's dinner." More...

Profile
MacArthur Foundation
Zooplankton Research in a Changing Antarctic

Zooplankton Research in a Changing Antarctic

Marine scientist Debbie Steinberg discusses the connection between variations in the population of zooplankton in Antarctica and climate change. More...

Article
Fondriest Environmental, Inc.

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