Laboratory write-ups should be
typed (or neatly written on lined, non-spiral bound paper). Clearly label each of the eight headings,
exactly as shown in this format guide.
Write all portions of the lab in complete sentences.
·
State in your own words
the problem or research question.
Describe the problem and define any terms included in the problem
statement.
·
Clearly list and state the following variables:
Controlled variable: The variable that remains constant in all parts of the procedure.
Independent
variable: The variable that you
manipulate. The data for this
variable will be placed on the “x” axis (horizontal line) of your graph. An
example would be “time in minutes.”
Dependent
variable: The variable for
which you collect resulting data.
The data for this variable will be placed on the “y” axis (vertical
line) of your graph. Some examples are
“substance produced,” “substance used
up,” or “degree of color change.” Be
sure to identify appropriate units.
·
Write your hypothesis before you begin the laboratory.
·
State clearly what your expected data might be and why
you expect these results. Use a
rational explanation. If appropriate,
include a proposed relationship between two or more variables (i.e. “if ‘a’ is
done, then ‘b’ will occur”).
·
If needed, draw diagrams of your apparatus.
·
Write the lab procedures prior to performing the lab. The teacher will provide specific guidelines
for each lab activity.
·
In your own words state specifically the
designed procedures, in numbered steps.
Your method must allow for the control of variables and the collection
of sufficient relevant data.
·
Record raw data with precision, using correct units, during
the lab. Your data may be both
qualitative and quantitative. Explain
uncertainties where necessary.
·
Use a well-organized chart or table when
collecting data to allow for easy interpretation.
VII. Data Processing and Presentation (Process raw data correctly.
For example, a laboratory drawing would be considered data
collection, but the accurate labeling of the
drawing would be processing.)
·
Present the processed data appropriately in order for it to
be easily interpreted. Where relevant,
take into account errors and uncertainties.
When quantitative data is collected, it should be presented in a graph. Clearly show all necessary calculations. Make sure to label each axis correctly and
include units! (Remember, the
independent variable is placed on the “x” axis and the dependent variable is
placed on the “y” axis.)
·
Answer specific lab questions in section VII. They will help you to think about what you observed
and what your data might mean.
·
Formulate a valid conclusion based on the correct
interpretation of the results. Explain your reasoning and compare your actual
results to your original hypothesis.
Where appropriate, compare your results with literature values (what you
have previously read).
·
Evaluate the procedure and subsequent results including your
apparatus, materials, and methods utilized.
Include an explanation of limitations, weaknesses, or errors.
·
After identifying weaknesses, state realistic suggestions to
improve the investigation.
Revised
September, 2002