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DDT in a Food Chain

DDT in a Food Chain

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DDT in a Food Chain

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  1. DDT in a Food Chain Science 10 Ms. Lowrie

  2. DDT Facts • a.k.a. dichloro-diphenyl-trichloroethane! • Example of pesticide • Insecticide • Made in 1874 • First used during World War 2 (1940s)

  3. Let’s Read About It! • The DDT Story • page 31

  4. Biological Magnification • Poison accumulates in body • Organisms in higher trophic levels contain MORE DDT than organisms in lower levels

  5. DDT

  6. 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?

  7. Task: Answer the following: • #1 – 6 on page 32

  8. Any Questions?