BioEd Online
Bio Ed Online: Bio Build Up
This activity allows students to make a simple model food chain and observe how toxic chemicals can become concentrated in the bodies of consumers at the top of the chain.
PBS
Pbs Learning Media: Trade Secrets: Classroom Content: Lesson 2
Trade Secrets reveals how the public's right to know the truth about the thousands of chemicals that surround us has been compromised. This lesson focuses on the roles that scientists, industries, citizens, and government agencies play...
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