Question

NOW TEST: Run for 24 hours (Goes with Question 8 Hypothesis)
Test results from in the Light: Experiment and Data collection:
Remember that the Oxygen (O2) and Carbon Dioxide (CO2) levels begin at 6.0 for all of the test tubes. After you click play and watch the experiment take place
a. take a picture of the results and paste them into the show your work,
b. drag the results from the list on the left to match what you observed.

Hint: there are three responses for each:

Some answers will be used more than once.
CO2 levels go up
CO2 levels go down
Oxygen levels go up
Oxygen levels go down
No change in CO2
No change in O2
Test tube turns Yellow
Test tube stays Green
Test tube turns blue
Tube A Snail Only
Tube B Plant Only
Tube C Snail and Plant
Tube D No Snail or Plant (Control)

Answer 1

Predicted/expected results after 24 hours in the light (starting O2 = CO2 = 6.0):

- Tube A — Snail only:
- CO2 levels go up
- O2 levels go down
- Test tube turns yellow

- Tube B — Plant only:
- CO2 levels go down
- O2 levels go up
- Test tube turns blue

- Tube C — Snail and plant:
- No change in CO2
- No change in O2
- Test tube stays green
(Note: if the plant’s photosynthesis exceeds the snail’s respiration you might instead see CO2 go down / O2 go up and the tube turn blue — record whatever you observe.)

- Tube D — No snail or plant (control):
- No change in CO2
- No change in O2
- Test tube stays green

Be sure to take a photo of the final tubes and paste it into your “show your work,” and drag the corresponding items from the list to each tube as shown above.