Science Struck
Science Struck: Difference Between Food Chain and Food Web
Explains the characteristics of food chains and food web; the different levels of producers, consumers, and decomposers; and the differences between food chains and food webs. Includes charts and a Venn diagram comparing the two.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: The Effects of Pesticides on the Food Chain
Lesson plan to construct and explain a food chain. Includes games and activities to teach and reinforce concepts.
CK-12 Foundation
Ck 12: Earth Science: Flow of Energy in Ecosystems
[Free Registration/Login may be required to access all resource tools.] Describes how energy is transferred from one organism to another.