Photosynthesis in Elodea Plants
Name _____________________
_____
Research Question
Sign Off:
How does (manipulated / independent variable) _________________________________________________
affect (responding / dependent variable) _______________________________________________________?
Hypothesis
Sign Off:
_____
If (manipulated variable is changed) ___________________________________________________________
____________________________________________________________________________________
then (effect on responding variable) ___________________________________________________________
____________________________________________________________________________________
because (the scientific reason )_____________________________________________________________
___________________________________________________________________________________
Variables
Sign Off:
_____
Manipulated
(Independent)
Variable
Responding
(Dependent)
Variable
Controlled Variables
1
Materials and Procedure
Sign Off:
_____
Material List
Step by Step Procedure
Data Tables
Raw Data:
Processed/Calculated Data:
2
Rate of Photosynthesis Lab Report Rubric – Must be typed
Item
What was your investigative question?
Hypothesis with reason
Procedure (see below)
Complete data table with title.
Conclusion
Answers experimental question with concluding statement
Includes experimental data - low value for responding variable with
corresponding manipulated variable value
Includes experimental data -high value for responding variable with
corresponding manipulated variable value
Explains how experimental data supports conclusion
Provides scientific explanation for conclusion (trend in data)
Evaluation
Describes how the validity of the experiment could be improved
Describes how the reliability of the experiment could be improved
TOTAL
Points
Pts possible
1
1
8
3
1
1
1
1
1
1
1
20
Procedure
Description
Controlled
Variables
At least three controlled variable are identified and present in the procedure or the materials list (Examples:
temperature/distance/volume remains the SAME for all trials).
Manipulated
Variable
Only one manipulated variable (state variable from question) is identified in the procedure and data table.
The manipulated variable must have at least three test conditions to be credited (Example: The ________
(manipulated variable) will be tested at 0F, 45F, and 90F.)
Responding
Variable
The responding variable (state variable from question) is identified in the procedure and data table (if given).
Record
Measurements
Trials are
Repeated
Experimental
Control
Condition
The procedure states that measurements are recorded periodically and gives a data table. Example: Record
plant height (cm) every week for 4 weeks.
At least three trials for each of the
three test conditions is planned and
present in a data table, to measure
the responding variable.
Example:
Trials
1
2
3
Average
Rate of Cellular Respiration (CO2 ppm/min)
Control (70F)
0F
45F
90F
The procedure includes an additional setup in which the manipulated variable is not changed and the
responding variable is measured for each condition in the experimental setup(s). Example: The
_________(manipulated variable) will also be tested in a control condition at room temperature (70F) for
comparison.
Extra
Validity Measure
The procedure includes an additional validity measure for a total of at least 3 control variables.
Logical Steps
The steps of the procedure are detailed enough to repeat the procedure effectively Reminders:
 Do not write “record data”  instead write “record data every ________(time period)”
 Do not record fake data
 Data must have UNITS!
 Must be repeatable by ANYONE
 Diagrams must be detailed and labeled if used
3
4