Calculate rate of volume change and photosynthesis Complete the following steps
Calculate rate of volume change for Elodea in green light. Record in Lab Data 32 Rate of volume change al Was your calculation for rate of change correct? Time (min) Tube 1 Green Light 0 3.2 5 3.4 10 3.5 15 3.7 20 3.8 Rate of volume change (mL/hr) 1 hr 3.1 29 42 28 2.5 5.3 24 2.1 64 2.1 2
Calculate rate of volume change for Elodea in green light in covered tube. Record in Lab Data 1.8 7.5 1.7 final volume(ml) – initial volume(ml) Time(min)
Calculate rate of volume change for Elodea in blue light. Record in Lab Data X 600 hr How to Calculate Rate of You Change
Calculate rate of volume change for Elodea in blue light in covered tube. Record in Lab Data Green light Blue light Rate of photosynthesis Rate of photosynthesis) – Rate of volume changeur
Calculate rate of photosynthesis for Elodea in green light. Record in Lab Data ml. hr – Rate of volume changed mL Calculate rate of photosynthesis for Elodea in blue light. Record in Lab Data
The correct answer and explanation is:
To calculate the rate of volume change for Elodea in both green and blue light, we’ll use the data you provided. The rate of volume change is typically calculated by finding the difference in volume between two time points, and then converting that to a per-hour rate.
General Formula for Rate of Volume Change:
Rate of volume change=Final Volume−Initial VolumeTime (in hours)\text{Rate of volume change} = \frac{\text{Final Volume} – \text{Initial Volume}}{\text{Time (in hours)}}
1. Rate of Volume Change for Elodea in Green Light:
Given the data for green light:
- 0 min: Volume = 3.2 mL
- 5 min: Volume = 3.4 mL
- 10 min: Volume = 3.5 mL
- 15 min: Volume = 3.7 mL
- 20 min: Volume = 3.8 mL
Let’s calculate the rate of volume change between the time intervals, converting to per hour.
From 0 min to 5 min: Rate=3.4−3.25 min×60=0.25×60=2.4 mL/hr\text{Rate} = \frac{3.4 – 3.2}{5 \, \text{min}} \times 60 = \frac{0.2}{5} \times 60 = 2.4 \, \text{mL/hr}
From 5 min to 10 min: Rate=3.5−3.45 min×60=0.15×60=1.2 mL/hr\text{Rate} = \frac{3.5 – 3.4}{5 \, \text{min}} \times 60 = \frac{0.1}{5} \times 60 = 1.2 \, \text{mL/hr}
From 10 min to 15 min: Rate=3.7−3.55 min×60=0.25×60=2.4 mL/hr\text{Rate} = \frac{3.7 – 3.5}{5 \, \text{min}} \times 60 = \frac{0.2}{5} \times 60 = 2.4 \, \text{mL/hr}
From 15 min to 20 min: Rate=3.8−3.75 min×60=0.15×60=1.2 mL/hr\text{Rate} = \frac{3.8 – 3.7}{5 \, \text{min}} \times 60 = \frac{0.1}{5} \times 60 = 1.2 \, \text{mL/hr}
2. Rate of Volume Change for Elodea in Green Light (Covered Tube):
You can calculate similarly for the covered tube. Given:
- Initial Volume (at 0 min) = 1.8 mL
- Final Volume (at 20 min) = 7.5 mL
Rate of volume change: Rate=7.5−1.820 min×60=5.720×60=17.1 mL/hr\text{Rate} = \frac{7.5 – 1.8}{20 \, \text{min}} \times 60 = \frac{5.7}{20} \times 60 = 17.1 \, \text{mL/hr}
3. Rate of Volume Change for Elodea in Blue Light:
You can apply the same process for blue light with the given data. Since you have not provided the specific volumes for blue light, you would need to fill in those numbers to calculate the rate.
4. Rate of Volume Change for Elodea in Blue Light (Covered Tube):
Similarly, for the blue light in the covered tube, you will use the volume data to find the rate of change.
5. Rate of Photosynthesis:
The rate of photosynthesis can be derived by comparing the rate of volume change for the uncovered tube (with light exposure) to the rate of volume change for the covered tube (no light exposure). The difference in volume change represents the volume of oxygen produced due to photosynthesis.
Rate of Photosynthesis = Rate of Volume Change (Uncovered) – Rate of Volume Change (Covered)
Example (Green Light):
If the rate of volume change in green light (uncovered) is 2.4 mL/hr and the rate in the covered tube is 17.1 mL/hr, then: Rate of Photosynthesis (Green Light)=2.4 mL/hr−17.1 mL/hr=0.4 mL/hr\text{Rate of Photosynthesis (Green Light)} = 2.4 \, \text{mL/hr} – 17.1 \, \text{mL/hr} = 0.4 \, \text{mL/hr}
6. Conclusion and Explanation:
The rate of volume change is a measure of the overall growth and physiological activity of the Elodea plant, including both photosynthesis (production of oxygen) and respiration (consumption of oxygen). A higher rate of volume change indicates higher metabolic activity, which is directly influenced by the light conditions (green or blue light) and whether the tube is covered (restricting light exposure).
Photosynthesis in Elodea, like other plants, is more efficient in the presence of light, and the rate of volume change (in an uncovered tube) is expected to be higher in both green and blue light compared to a covered tube. The rate of photosynthesis, therefore, represents the oxygen production due to photosynthesis, measured by the difference in volume changes between exposed and covered tubes.
Would you like to go deeper into interpreting the results or calculating with other data points?