toxicity - Anshum Sood 1-15-08 APES Ms. Brydon Period. 4...

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Anshum Sood 1-15-08 APES Ms. Brydon Period. 4 Purpose: To see what the LD 50 is for worms in ethyl alcohol. Materials: 116 mL Ethyl Alcohol, 16 petrie dishes, graduated cylinder, 160 mL water, 80 black worms, dropper pipette. Hypothesis: All the worms will die. Procedure: 1. Fill each of the petrie dishes with 10 mL water. 2. Put ten black worms in each petrie dish. 3. Quickly measure out 40 mL ethyl alcohol and put in dish 1. 4. Quickly measure out 25 mL ethyl alcohol and put in dish 2. 5. Quickly measure out 20 mL ethyl alcohol and put in dish 3. 6. Quickly measure out 15 mL ethyl alcohol and put in dish 4 7. Quickly measure out 10 mL ethyl alcohol and put in dish 5 8. Quickly measure out 5 mL ethyl alcohol and put in dish 6. 9. Quickly measure out 1 mL ethyl alcohol and put in dish 7. 10. Leave dish 8, the control group, untouched. 11. Let worms sit in the ethyl alcohol for five minutes.
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toxicity - Anshum Sood 1-15-08 APES Ms. Brydon Period. 4...

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