Setup:
Set up your test tubes so that
Test tube A has a snail.
Test tube B has a plant.
Test tube C has a snail and a plant.
Test tube D has neither a snail nor a plant.
Click "Show Oxygen and CO2 values (in ppm)"
Keep the light on.
Press Play.
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Set up your test tubes so that
Test tube A has a snail.
Test tube B has a plant.
Test tube C has a snail and a plant.
Test tube D has neither a snail nor a plant.
Click "Show Oxygen and CO2 values (in ppm)"
Keep the light on.
Press Play.
Independent variables: What things are we changing in each of the test tubes?
Dependent variables: What things are we measuring in this experiment?
Constants: What stays the same in each test tube?
Prediction: What do you expect might happen in each of the test tubes?
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, drag the results from the list on the left to match what you observed.
Some answers will be used more than once.
Hint: There should be something about oxygen AND carbon dioxide for each tube.
CO2 levels go up
CO2 levels go down
Oxygen levels go up
Oxygen levels go down
No significant change in CO2
No significant change in O2
Tube A Snail Only
Tube B Plant Only
Tube C Snail and Plant
Tube D No Snail or Plant
Explain the results from #5. What was happening in each of the test tubes?
Big concept connections:
Watch the video below to learn about CO2 levels and ocean acidification. Use the information to help answer the question below.
How do the inputs and outputs of photosynthesis and cellular respiration connect to the evidence you collected in the experiment and your observed results?
Self-assess yourself on the following learning targets:
I can use a model to illustrate how photosynthesis transforms light energy into stored chemical energy.
I can use a model to illustrate that cellular respiration is a chemical process whereby the bonds of food molecules and oxygen molecules are broken and the bonds in new compounds are formed resulting in a net transfer of energy.
I can construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.
