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- 1. Multiple Choice
What may have caused these results?
Elodea was doing photosynthesis.
Elodea was doing respiration.
Snails were doing photosynthesis.
Snails and elodea were doing respiration.
- 2. Multiple Choice
If the lights are left on, in which test tube would you expect to see the most CO2 after the experiment?
A
B
C
D
- 3. Multiple Choice
In which test tube will the most photosynthesis take place if the lights are left on?
A
B
C
D
- 4. Multiple Choice
If the lights are turned off, in which test tube(s) would respiration be taking place? Choose all correct answers.
A
B
C
D
- 5. Multiple Choice
If the lights are turned on, in which test tube(s) would photosynthesis be taking place? Choose all correct answers.
A
B
C
D
- 6. Multiple Choice
What caused these results?
The snail used photosynthesis to decrease the amount of O2
The snail used respiration to increase the amount of O2
The snail used photosynthesis to increase the amount of CO2
The snail used respiration to increase the amount of CO2
- 7. Multiple Choice
What could be changed in the set up of this experiment to increase the amount of O2 that results? Choose all correct answers.
Turn the lights off
Leave the lights on and add a snail
Leave the lights on and add a plant
Leave the lights on and add two plants
- 8. Multiple Choice
What results would you expect with one snail, one elodea, and the lights on?
The amount of CO2 and O2 would stay about the same.
The amount of CO2 would increase and O2 would decrease
The amount of CO2 would decrease and O2 would increase
The amount of CO2 and O2 would both decrease
- 9. Multiple Choice
What results would you expect with one snail, one elodea, and the lights off?
The amount of CO2 and O2 would stay about the same.
The amount of CO2 would increase and O2 would decrease
The amount of CO2 would decrease and O2 would increase
The amount of CO2 and O2 would both decrease
- 10. Multiple Choice
What could be done to increase the amount of oxygen in this experiment? Choose all correct answers.
Turn off the lights.
Add another elodea
Add another snail
Remove the snail
- 11. Multiple Choice
What may have caused these results? Choose all correct answers.
The snails used the O2 to create more CO2
The snails used the CO2 to create more O2
The elodea used the CO2 to create more O2
The elodea used the O2 to create more CO2
- 12. Multiple Choice
What may have caused these results? Choose all correct answers.
The snails used the O2 to create more CO2
The snails used the CO2 to create more O2
The elodea used the CO2 to create more O2
The elodea used the O2 to create more CO2
- 13. Multiple Choice
What results would you expect with only snails in the test tube and the lights on?
The amount of CO2 and O2 would stay about the same.
The amount of CO2 would increase and O2 would decrease
The amount of CO2 would decrease and O2 would increase
The amount of CO2 and O2 would both decrease
- 14. Multiple Choice
What may have caused these results? Select all correct answers.
Snail were doing respiration
Snails were doing photosynthesis
Elodea and snails were doing photosynthesis
Elodea was doing respiration
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