DDT in a Food Chain

Science 10Ms. Lowrie

DDT Facts

a.k.a. dichloro-diphenyl-trichloroethane!

Example of pesticide Insecticide

Made in 1874

First used during World War 2 (1940s)

Let’s Read About It!

The DDT Story page 31

Biological Magnification

Poison accumulates in body

Organisms in higher trophic levels contain MORE DDT than organisms in lower levels

DDT

Task:

Answer the following:

A. List three positive effects that DDT gave human populations.

B. List three negative effects that DDT had on the environment.

C. How did DDT affect birds of prey?

Task:

Answer the following:

#1 – 6 on page 32

Any Questions?