Plant Transpiration Lab Write-up Expectations
TITLE PAGE
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Include the Title of the Lab. In this lab it should include the question we were trying to answer.
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Include the name of the person submitting the lab
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Include the date the lab was due
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Include the name of the instructor and name of the class
INTRODUCTION
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Purpose of the lab
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Include pertinent information about our species of plant (Look up Croton Gold Dust)
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Explain what transpiration is and what it accomplishes for the plant
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What is the advantage of closed stomata to a plant when water is in short supply? What are the disadvantages?
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Explain the role of water potential gradients in the rate of water movement from the leaf to the air.
MATERIALS
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Include all the materials needed to complete this lab
PROCEDURE
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Include a paragraph that describes how to carry out the lab successfully. Usually a lab report includes a step by step numbered
procedure – BUT - I would like you to write this section out as a paragraph. When you are asked to design a controlled
experiment in an AP Biology essay – you will have to write out your procedure in paragraph form.
HYPOTHESIS
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Include a TESTABLE hypothesis that provides an educated guess for all components of the lab
MANIPULATE ONE VARIABLE
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What variable did you manipulate in this lab?
PROVIDE A CONTROL GROUP
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What was your control group? You use the control group as a comparison for the experimental groups
KEEP ALL OTHER VARIABLES CONSTANT
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Provide 5 constants in your lab. Please number these.
PROVIDE QUANTITATIVE DATA/VERIFY THE EXPERIMENTAL RESULTS/STATISTICALLY ANALYZE RESULTS
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Explain what your quantitative data was in the lab. It is usually your dependent variable (aka the Y axis)
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Explain how you verified your data
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Explain how you statistically analyzed your data
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Explain why you had to calculate leaf surface area in tabulating your results?
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Include the data tables of the transpiration results (I gave you this)
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Include the average transpiration data tables for each environment
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Include a data table of the transpiration rates for each time interval (for every environment)
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Graph average data only [ by hand or Excel ] (Look at the data to decide whether you connect the data points or use a line of best
fit)
CALCULATION
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Explain and show how we calculated the surface area of all of your plants leaves
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Show how you calculated transpiration rate for each time interval ( only show one example)
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Analyze the data in words
CONCLUSION
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Restate the hypothesis and then use DATA to help support or refute your hypothesis. You should also refer to data tables and or
graphs during the conclusion. This should be full of discussion
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What did you learn in this lab?
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What would you have done differently if you had to do this lab again?
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Provide a wonderful description of why each environment had different transpiration rates. This should be pretty detailed!
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Describe three structural adaptations that enable plants to reduce water loss from their leaves
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Include possible reasons for error – be specific – don’t just say human error guys!!!
REFERENCES
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Please reference any material