Demonstration and Experiment Observation and Conclusion Package—Body Energy Unit
Question 1 from above:
Question 2 from above:
Observations and Conclusions
Observation of Leaf before addition of iodine
Observation of Leaf after addition of iodine
Conclusion
1
Demonstration and Experiment Observation and Conclusion Package—Body Energy Unit
Do the leaves contain starch before the experiment? Why or why not?
Do the leaves contain starch after the experiment? Why or why not?
Has the plant carried out photosynthesis? How do you know?
What would be your control plant? See the description above if you are unsure of what a control plant is.
2
Demonstration and Experiment Observation and Conclusion Package—Body Energy Unit
Make a sketch of the leaf after starch testing.
Which parts of the test leaf go blue-black?
Why do the parts that were covered not contain starch?
3
Demonstration and Experiment Observation and Conclusion Package—Body Energy Unit
Describe the result of oxygen test with the glowing splint. What is your conclusion?
Why was the hydrogencarbonate added to the water?
Why is it essential that a water plant like Canadian pondweed is used in this experiment?
Why is the gas collected unlikely to be pure oxygen?
4
Demonstration and Experiment Observation and Conclusion Package—Body Energy Unit
Distance from light source (cm)
Bubbles in ________ seconds
Did the number of bubbles increase when the lamp was nearer the plant? Why do you think this was?
5
Demonstration and Experiment Observation and Conclusion Package—Body Energy Unit
Make a sketch of your leaf. Include as much detail as possible.
Is the upper surface more glossy than the lower? Why is this?
Which surface is the darker green?
What gives the leaf its green color?
Does most light get to this surface?
6
Demonstration and Experiment Observation and Conclusion Package—Body Energy Unit
Make a sketch of your leaf section under low power and label all of the structures that you can identify.
Now look at each type of tissue under high power. Try to find the smaller structures such as chloroplasts, the
individual xylem and phloem tubes, etc.
7
Demonstration and Experiment Observation and Conclusion Package—Body Energy Unit
Make a sketch of the stomata that you observe at high power and label the structures that you can identify.
Make a sketch of what you observe on the upper surface of the leaf.
8
Demonstration and Experiment Observation and Conclusion Package—Body Energy Unit
Describe what happened to the celery overnight.
Make a sketch of what you see under the microscope.
9
Demonstration and Experiment Observation and Conclusion Package—Body Energy Unit
Mass of flask A (g)
Observations
Mass of flask B (g)
Initial
Final
Change
Has the level dropped in flask A? Why has it?
Is flask A now lighter? Why is this?
10
Observations
Demonstration and Experiment Observation and Conclusion Package—Body Energy Unit
Vaseline on upper
and lower surface
Vaseline on lower
surface only
Initial observations
Final observations
Conclusion
11
Vaseline on upper
surface only
No vaseline
Demonstration and Experiment Observation and Conclusion Package—Body Energy Unit
12
Demonstration and Experiment Observation and Conclusion Package—Body Energy Unit
13