This lesson will review the difference between autotrophs and heterotrophs, and show how both play important roles in a food web. It is 2 of 4 in the series titled "Autotrophs vs. Heterotrophs."

Learn about the mysterious jellyfish blooms that have occurred in the world's oceans. Because the resulting alteration to the marine food web has had devastating effects, researchers grow and study jellyfish at the Monterey aquarium....

[Free Registration/Login may be required to access all resource tools.] About 10,000 bird species belong to 29 different orders within the class Aves. The diversity among birds is striking. Birds can vary greatly in size and color. Some...

How are animals and plants linked? What is the difference between a producer and consumer? How is a predator different from prey? Take this food chain quiz to find out the answers to these questions and more. Links allow you to convert...

The difference between food chains and food webs is explained.

Read a brief history of the use of DDT in the United States, its effect on wildlife, and the banning of the toxin in 1972 by the EPA.

A colorful tutorial about ecological pyramids. Read the information, and then check your understanding with some questions and answers about the topic.

Join Ellen on her trip to the Kaap De Goede Hoop in South Africa, and learn more about plants, animals, and energy.

[Free Registration/Login may be required to access all resource tools.] Describes how energy is transferred from one organism to another.

This is a teacher's guide to a lesson on ecosystems. The objective is for the students to set up their own ecosystem and define the roles of producers, consumers and scavengers.

A comprehensive ecology learning module where students assess the dependence of all organisms on one another and the flow of energy and matter within their ecosystems.

Students will understand and describe food chains and food webs, and explain how energy is transferred between their trophic levels.

[Free Registration/Login Required] To show the dependence of animals on the plant world, these flipchart pages contain examples of food chains and food webs, as well as other information about animals and habitats.

Biological magnification is the term used to described the increasing accumulation of substances in organisms as one looks at higher trophic levels in a food chain. When that substance is a toxin, such as a heavy metal or a pesticide,...

This colorful site examines the food chain and delves into an explanation of what producers are and where they fit in an overall ecosystem.

Students learn about aquatic life and the importance of a balanced aquatic habitat by collecting micro- and macro-organisms. By the end of the instructional activity, they will be able to identify and develop a pond food web.

[Free Registration/Login Required] A 2nd grade unit on animal environments and habitats. Include web links for information on different land and water habitats, as well as a lesson on food chains.

This lesson will review the difference between autotrophs and heterotrophs, and show how both play important roles in a food web. It is 3 of 4 in the series titled "Autotrophs vs. Heterotrophs."

Read and fill in the blanks of this passage explaining who eats what. Each blank has a dropdown menu with choices. When you finish, click CHECK MY ANSWERS. If you pick a wrong answer, the right answer will be displayed along with your...

[Free Registration/Login may be required to access all resource tools.] Understand how energy flows within ecosystems through the use of energy pyramids.

[Free Registration/Login may be required to access all resource tools.] Describes how energy is transfered from one organism to another.

[Free Registration/Login Required] A literary text about some animals who have to learn to share their space around the pond. A question sheet is available to help students build skills in reading comprehension.

In this tutorial, Bill Nye explains how to catch planeria, small carnivorous worms that live in ponds. In addition, he explains their role in the environment.

[Free Registration/Login may be required to access all resource tools.] Describes how energy is transfered from one organism to another.