Kelsey Ennis
http://glencoe.mcgraw-hill.com/sites/007877800x/student_view0/unit2/chapter11/virtual_lab.html
Problem: What color of the visual light spectrum
Hypothesis: I believe that plants reflect the ___violet___________ color of the visible
light spectrum.
Use these colors to choose from for your hypothesis.
Red
Violet
Blue
Green
Orange do
Photosynthesis
plants
and the Light
reflect?
Spectrum
Virtual Lab
Procedure: Teacher demonstration. The simulation shows growth over 30 days.
Data: Record the height the plants grows in cm under the appropriate column.
Plant Type
Red
Violet
Blue
Green
Orange
11cm
8.3cm
12cm
3.3cm
6cm
lettuce
13cm
7cm
14cm
1cm
7.6cm
radish
Post Analysis Questions:
1. Based on the data collected, which color light does plants reflect most? Green
2. Based on the data collected, which color light does plants absorb most? Blue
3. In this experiment, what was the independent variable? The color of light
4. In this experiment, what was the dependent variable? The plant height over a 30
day period.
5. Explain how you determine which item was the independent variable and which
was the dependent variable. The one that you change is the independent variable.
The dependent variable the one that is measured.
Kelsey Ennis
Conclusion: Accept or reject your hypothesis.