DDT in a Food Chain Science 10 Ms. 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
Task: Answer the following: • List three positive effects that DDT gave human populations. • List three negative effects that DDT had on the environment. • How did DDT affect birds of prey?
Task: Answer the following: • #1 – 6 on page 32