Name: Alma Oscarson________ Date: 10-14-15________ Period: 4____
Photosynthesis Virtual Labs.
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 red and blue are absorbed more by the plant then red and blue will be the most effective and green will cause 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 tested all of the colors on the different plants and got the average growth. They had the same amount of days to grow but the light were different.
Results:
Filter Color
|
Spinach Avg. Height (cm)
|
Raddish Avg. Height (cm)
|
Lettuce Avg. Height (cm)
|
Red
|
18.3
|
13
|
11
|
Orange
|
14.6
|
8
|
6.6
|
Green
|
2
|
1.3
|
3
|
Blue
|
19
|
15
|
12.3
|
Violet
|
17
|
10
|
8.6
|
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.
My data did support our data because i said that blue and red light would cause the most plant growth and it did, and the green did the least plant growth which i thought.
4. What conclusions can you draw about which color in the visible spectrum causes the most plant growth?
That blue and red are absorbed more by the plant which causes the plant to grow more.
5. Given that white light contains all colors of the spectrum, what growth results would you expect under white light?
I would expect that the plant would grow fast because it has both blue and red light which causes the plant to grow more
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, and control?)
- Data table
- Conclusion (Just 1st and 3rd paragraphs since there's no way to make errors in a virtual lab)
*Type this document on a word processor or in Google Docs and submit via Canvas.
Question: How does temperature affect photosynthesis and the number of bubbles.
Hypothesis: If a medium like 25-30 degrees help plants grow faster than the medium temperature will make more bubbles.
Experimental parameters: The control in this experiment is 10 degrees of celcius. The dependent variable in this experiment is the amount of bubbles in 1 minute. The independent variable is the degree of temperature.
Degrees of celcius
|
10 degrees
|
25 degrees
|
40 degrees
|
Amount of bubbles in 1 minute
|
12
|
40
|
33
|
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