CBL Interfacing
Photosynthesis In Isolated Chloroplasts
Extensions
In this investigation we learned an approach for measuring the
rate of photosynthesis. Using the technique which you applied,
design an experiment to determine the effect of two factors on
the rate of the reaction:
A. Light Intensity
B. Wavelength (color)
The investigation will contain the following components:
- Hypothesis
- General Experimental Design
- Materials
- Safety Considerations
- Procedure
- Result
- Analysis of Data
- Conclusion
Steps 1-5 must be done ahead of time. Your teacher will assign
you to submit your proposal ahead of time, correct it and then
allow you to carry out your experiment.
Hypothesis
State your hypothesis in an if....then...format.
The hypothesis is an "educated guess" so state why
you expect the results which you have predicted. State the hypothesis
in a form that includes some specifics. If you do, the hypothesis
should guide you through the general design of your experiment.
General Experimental Design
What is your independent variable? How will you set up
your controls to insure that you have one and only one independent
variable? What is your dependent variable and how will you measure
it?
Materials
Make a list of all materials which you will need to conduct
your experiment. This takes careful, careful planning.
Safety Considerations
Are you working with chemicals, acids, bases? Are you
heating any solutions? How will you protect you and your classmates
during your experiment?
Procedure
Determine a reasonable, logical order for carrying out
your experiment. Write out a step by step procedure. Include all
details.
Results
Prepare a data sheet with tables and a set of axes for
a graph. Be sure to enter all data, including any unexpected observations.
Analysis of Data
Determine what manipulations of data will have to be
carried out to make an analysis of your results most meaningful.
Would a graph make it easier to analyze your results?
Conclusion
What do you conclude based on the analysis of data? Does
the data support or refute your hypothesis? Explain.
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