Revisit of Osmosis Data Analysis and Conclusions:
Group Activity
Based on your individual work, I want you to discuss and fill in the following as a group based on plant part.
Graph #1: Determining the water potential of a specific plant part:
Title: Must clarify the purpose of the graph. It must be evident in your title which variable is affecting the
other. A title that simple states ________ compared to________ does not identify your understanding of
the variables.
New Title:
Written Analysis:
Pick on of the graphs from your group. An analysis should show WHAT you can determine from the graph
but not why.
What are 3 things that can be determined from your graph. Show the data or calculation in the first box and
how you would explain what this states in the second box.
Graph #2: Molarities of different plant parts:
New Title:
Written Analysis:
What can you determine from average molarities? Calculate each below and then identify the trend you
would want people to see. A trend doesn’t have to identify which plant is first…second…third…etc, but you
may want to identify if two seem to be close in value and one is very different.
Carrot
Mushroom
Potato
Celery
Error bars only can be compared when they are understood relative to the bar that they are measuring.
One way to do this is looking at error as a percent of the average. Calculate for each bar. Then use this
information to write a trend about which plant part has the most variability and which has the least.
Carrot
Mushroom
Potato
Celery
Conclusion:
Conclusions connect to information we have learned or information you research to explain why the trends
in the data exist. To do this, you must also cite the relevant values from the data.
Part 1: Your plant part…you may pick one person’s data or combine data from groups to make discuss this
conclusion. In your explanation you must include relevant vocabulary (think…flaccid, turgid, equilibrium,
etc)
Discussion points
Molarity
Osmotic Potential
Variability (not as a
source of error but as
a function of the plant
organ)
Data to cite
Explanation
Part 2: Comparison of plant parts (fungi). You need to show your knowledge of transport in a
plant system. Adding to this you need to cite information from the data that shows that this makes
sense.
Plant Part
Describe
Role in transport
2 Pieces of data that you Description of why the data is
can discuss to connect
relevant to your understanding
to the role in transport.
of plant transport
Root
Stem
Leave
Fungi “stem”
Part 3: Discussion of error.
You need to cite specific data to suggest that there is error (there always is error). Then you need
to discuss why this may have occurred and how you would improve the experiment how you would
go about seeing if the error is just based on variation.
Data
Discussion
Improvments
Reflection as a group:
4-All group members are confident
3-Some group members are confident
2-Many group members are not confident
1-All group members are not confident
Statement
Before this
lab/activity
After this
lab/activity
Ability to make a scatterplot with a best fit line choosing the
appropriate linear relationship and adding R2
Analyze data from a best fit line (eg. Solve for x when you know y)
and discuss the meaning of R2
Ability to make a bar graph with either 2 SEM or standard
deviation error bars.
Ability to use error bars to analyze the variability with data. How to
relate error bars of different sizes; when to use SD and when to
use 2SEM
Ability to cite specific data and connect to why the data is seen.
Ability to relate the lab as a small segment to the bigger picture
and connect the very specific data seen in the lab to the larger
picture.
Ability to use specific measures of precision and accuracy to
discuss error and offer improvments.
Grade:
Section
Graph 1 (title and
analysis)
Graph 2 (title and
analysis)
Conclusion
Connections
Error
Comments
Score