1.3.3 Lab: Investigate Cycling of O2 and CO2
Dry Lab
Environmental Science
Name: Aidan Wilkerson
Date: 8/25/2020
In this investigation, you will observe the release of O2 and CO2 into the environment. Gas
production by two types of organisms will serve as evidence of photosynthesis and cellular
respiration in action. In part 1, you will vary the amount of sugar present and observe the effect
on cellular respiration. You will also observe how the rates of these processes vary as
environmental conditions vary. In part 2, you will vary the amount of light and observe the effect
on photosynthesis. (Procedure moved to the bottom for convenience. Also, sorry about the wide
spacing. I wanted the questions to be on the same page as the answers.)
, Data for Part 1: Observing Evidence of Cellular Respiration
What changes, if any, did you notice in the bottles or balloons as you made observations?
Answer:
The balloons on bottles with no sugar did not expand.
The balloons on bottles with sugar took 30 minutes to start expanding.
The bottles that contain sugar expanded more with every observation.
Foam formed on top of the solution in bottles that contain sugar.
Data Table for Observing Cellular Respiration:
Circumference of balloon (inches)
No sugar Some sugar More sugar
Trial 1
0 8.5 10.5
(bottles 1, 3, & 5)
Trial 2
0 7.5 11.5
(bottles 2, 4, & 6)
Dry Lab
Environmental Science
Name: Aidan Wilkerson
Date: 8/25/2020
In this investigation, you will observe the release of O2 and CO2 into the environment. Gas
production by two types of organisms will serve as evidence of photosynthesis and cellular
respiration in action. In part 1, you will vary the amount of sugar present and observe the effect
on cellular respiration. You will also observe how the rates of these processes vary as
environmental conditions vary. In part 2, you will vary the amount of light and observe the effect
on photosynthesis. (Procedure moved to the bottom for convenience. Also, sorry about the wide
spacing. I wanted the questions to be on the same page as the answers.)
, Data for Part 1: Observing Evidence of Cellular Respiration
What changes, if any, did you notice in the bottles or balloons as you made observations?
Answer:
The balloons on bottles with no sugar did not expand.
The balloons on bottles with sugar took 30 minutes to start expanding.
The bottles that contain sugar expanded more with every observation.
Foam formed on top of the solution in bottles that contain sugar.
Data Table for Observing Cellular Respiration:
Circumference of balloon (inches)
No sugar Some sugar More sugar
Trial 1
0 8.5 10.5
(bottles 1, 3, & 5)
Trial 2
0 7.5 11.5
(bottles 2, 4, & 6)
