ib essthursday, october 16 th do now: do you think there might be toxins in your food? how would...
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IB ESS Thursday, October 16th
DO NOW: Do you think there might be toxins in your food? How would they get there?
Lab Questions are due tomorrow!
Bioaccumulation
• Toxins in the body that break down slowly or not at all can accumulate or increase over time until the animal dies.
Biomagnification
• Small amounts of toxins in lower tropic levels can increase in amounts when food travels to higher trophic levels.
Toxins
Toxin – Harmful or poisonous chemical or molecule
DDT- “dichlorodiphenyltrichloroethane” a pesticide that was sprayed to control bugs in the 1940’s- 1970’s.
Dieldrin- pesticide, stored in the fat of animals higher up the food chain.
Mercury – metallic element that can be harmful to ingest. Often found in top predatory fish.
•Connector•Roller•Manager•Recorder
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