Lab 1: Glencoe Photosynthesis Lab
Analysis Questions
1. Make a hypothesis about which color in the visible spectrum causes the most plant growth and which color in the visible spectrum causes the least plant growth?
If plants absorb mostly blue and/or red light, then it will produce the most plant growth.
If plants absorb mostly green and/or yellow light, then it will produce the least plant growth.
2. How did you test your hypothesis? Which variables did you control in your experiment and which variable did you change in order to compare your growth results?
I used the virtual lab to test my hypothesis. The variables I controlled were type of plant, amount of light, and soil. The variable I changed in order to compare my growth results was the wavelength or color of light.
Results:
Filter Color
|
Spinach Avg. Height (cm)
|
Radish Avg. Height (cm)
|
Lettuce Avg. Height (cm)
|
Red
|
18
|
13
|
11
|
Orange
|
14
|
8
|
7
|
Green
|
3
|
1
|
3
|
Blue
|
19
|
14
|
13
|
Violet
|
16
|
10
|
8
|
3. Analyze the results of your experiment. Did your data support your hypothesis? Explain. If you conducted tests with more than one type of seed, explain any differences or similarities you found among types of seeds.
Yes. The differences between other seeds is the type of plant and how much it grew. The similarities were that they all reacted to the light relatively the same.
4. What conclusions can you draw about which color in the visible spectrum causes the most plant growth?
I can conclude that blue and red light causes the most plant growth.
5. Given that white light contains all colors of the spectrum, what growth results would you expect under white light?
I would expect the plant to grow to be the average of all of the individual colors.
Site 2: Photolab
This simulation allows you to manipulate many variables. You already observed how light colors will affect the growth of a plant, in this simulation you can directly measure the rate of photosynthesis by counting the number of bubbles of oxygen that are released.
There are 3 other potential variables you could test with this simulation: amount of carbon dioxide, light intensity, and temperature.
Choose one variable and design and experiment that would test how this factor affects the rate of photosynthesis. Remember, that when designing an experiment, you need to keep all variables constant except the one you are testing. Collect data and write a lab report of your findings that includes:
- Question
- Hypothesis
- Experimental parameters (in other words, what is the dependent variable, independent variable, constants, and control?)
- Data table
- Conclusion (Just 1st and 3rd paragraphs since there's no way to make errors in a virtual lab)
*Type your question, hypothesis, etc. below. When done, submit this document via Canvas. You may also copy and paste it into your blog.
Question:
Will increasing the amount of CO2 cause more photosynthesis to occur?
Hypothesis:
If CO2 is used for photosynthesis, then a greater amount of CO2 will cause the plant to do more photosynthesis and produce more oxygen.
Experimental Parameters:
Dependent Variable: Rate of photosynthesis
Independent Variable: Amount of C
Control: 0 CO2
Constants: Water temperature (10 ⁰C), light intensity (100%), light wavelength (white), water, plant
Data Table:
Amount of CO2
|
None
|
All
|
O2 bubbles/ 15 sec
|
3
|
6
|
Conclusion:
In this virtual lab, I asked the question, will increasing the amount of CO2 cause more photosynthesis to occur? I found that increasing the amount of CO2 increases the production of oxygen in photosynthesis. When I increased the amount of CO2, more oxygen bubbles came out of the plant compared to no CO2. This data supports my claim because the higher amount of CO2 caused the plant to photosynthesize more and produce more oxygen.
This lab was done to demonstrate the effects of CO2 on photosynthesis. From this lab, I learned that increasing the amount of CO2 increases the rate of photosynthesis and produces more oxygen, which helps me understand the concept of the role of CO2 in photosynthesis. Based on my experience from this lab, I could apply this knowledge to another situation by helping stop global warming by planting more plants, which will suck CO2 out of the air and reduce the amount of global warming.
No comments:
Post a Comment