Describes five different types of decomposers that feed on decaying organic matter in the oceans and that are at the bottom of the ocean food chain.

An ecosystem is composed of biotic factors of a community of living organisms interacting with one another which we can see in food chains/webs. These diverse organisms stay together because of the need of food. Population is referred to...

This concise site that provides an explanation of what producers are along with a short quiz to test your knowledge of producers and consumers.

This unit on matter cycling and photosynthesis has students investigating the idea that all food comes from plants.

A complete lesson on owl pellets. Students can read information, watch a tutorial, and use their computer mouse to complete a dissection simulation right there on the screen.

This module offers an in depth study of the fundamental components of ecosystems. Activities include mini-lessons with videos and student assignments.

Travel with your students on a Virtual Field Trip to learn about Temperate Forest Biomes. You will also discover many informative and interactive websites.

Detailed explanation of the processes by which energy flows through an ecosystem. Scroll down and open Section 3.

[Free Registration/Login may be required to access all resource tools.] Describes how food chains and webs represent feeding relationships.

Describes how a food chain works in a desert and how the Mojave desert food chain works in particular.

This lesson explains the role plants play in the conversion of inorganic materials into organic material to support living things. It is 2 of 3 in the series titled "The Role of Plants in the Food Chain."

This lesson explains the role plants play in the conversion of inorganic materials into organic material to support living things. It is 3 of 3 in the series titled "The Role of Plants in the Food Chain."

Describes the characteristics of a tundra biome, how a tundra food chain compares to a tropical food chain, and what the different trophic levels look like.

Explains what a primary consumer's role in a food chain is and provides examples.

Explains what a food web is, the complexity of one in a rainforest, and how energy flows through a food web.

A short lesson explaining the "web of interactions" that occur in a food web. Understand how the energy flows between autotrophs and consumers. [0:35]

Explains the characteristics of tropical and temperate rainforests and what rainforest food webs look like.

Explains the processes by which energy flows through an ecosystem. Covers the meanings of key vocabulary, e.g., types of producers and consumers, trophic levels, food webs, and the energy pyramid.

[Free Registration/Login may be required to access all resource tools.] Describes how to identify trophic levels in a food chain or food web.

Students learn about energy and nutrient flow in various biosphere climates and environments. They learn about herbivores, carnivores, omnivores, food chains and food webs, seeing the interdependence between producers, consumers and...

Read to understand how energy and inorganic nutrients flow through a food chain in an ecosystem.

Explains what is meant by a tertiary consumer in a food chain and provides examples.

In this lesson, 4th graders explore animals and plants that inhabit ecosystems by using movement to deepen the retention of vocabulary. After reviewing the ecosystem players, students will play a call and response game by responding with...

See how combining yeast, sugar, and water can demonstrate the carbon cycle and show how microorganisms work in the food chain.