please see the uploaded word file.

Acti~lty 2: Oxygen generation during photosynthesis 1 - Fill two test tubes with a cut 4" piece of Elodea in a bicarbonate solution (carbon dioxide

source). Place a cylinder of colored filter over one test tube. The other test tube should remain uncovered. Make sure you record which color you chose in table 3.

2. Carefully insert a stopper, which has a long glass tube, into ~ach test tube . If the test tube is full enough, some of the fluid will rise in the tube. Carefully set both tubes upright in the test tube rack . Use a clothespin to prop up each test tube into a horizontal position so the glass tube is horizontal to the table .

3. Place a large beaker of water between the flood light and your test tube in order to absorb excess heat. Place the flood light 2-4 inches from the beaker, and the test tube immediately next to the beaker. Turn on the light. Allow the system to equilibrate for 5 minutes.

4 . Measure the d!filance the ware[1!1oved in each of the tour ten-minute intervals. Report your results on the class data sheet

5. Build a class data table to compare the amount of oxygen generated under different light wavelength conditions. Because different lab groups are examining different wavelengths, you will not be collecting an average of all groups in the experimental treatments.

th Table 3: Lab qroup data on oxvoen qeneration in Elodea in different wave enq s Fluid movement (in millimeters under different conditions

Conditions Control (full spectrum Color wavelength : First 10 minutes Second 10 minutes Third 10 minutes Final 10 minutes

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