Tuesday, November 8, 2011

Elodea & Snails Investigation

After reviewing photosynthesis and voting on the best photosynthesis mini project, students worked on designing an experiment using Elodea & Snails to look at photosynthesis.

Here are some hints for your experimental design:

Large test tubes (~50mL volume)
BTB indicator solution
Aluminum foil
Test tube racks
Electronic balances
Graduated cylinders

BTB turns blue in the absence of CO2, BTB turns yellow in the presence of CO2.

We will be analyzing these experiments in class on Friday (Wednesday schedule).

For homework you need to complete the experimental design.   Make sure to include your hypothesis and identify the independent and dependent variables.

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