Warm Up: Where does the mass in trees come from? 3/7/16
Watch the video of the biggest tree in the world, the General Sherman.� �Where does the tree get its mass? � Choose which student answer you agree with most and explain why.
Student A: Most of the mass came from the nutrients in the soil
Student B: No it is the sunlight.
Student C: Molecules in the air
Student D: Water in the roots
Document any questions that you have.
Norms for Sharing:
-Be kind
-Suspend judgment
-Step up step back
What did you learn from looking at your beans?
Can you add or subtract any of the ideas? What is your evidence?
Where Do Plants Get their Mass?
Include
Photosynthesis Lab
Tali will not give you spinach leaves until #1 and #2 are done
Hints:
You should be ready to put all your cups under the lights by 3:05PM at the latest! Allow at least 30 minutes to take measurements.
Put your cups under the light at the same time.
PRE-LAB QUESTIONS
�1. What factors could you measure to determine the rate of photosynthesis?
Floats per second = photosynthetic rate
�2. What factors could affect the rate of photosynthesis?
light (source, exposure time, color, distance)� temperature� CO2� leaf type
Photosynthesis Lab Notebook
Title: Your experiment
Purpose:Your Experiment
Prediction:
Method: IV, DV, CV (4) and altered protocol
Results: Data Table, Graph
Conclusions: What do your results tell you about photosynthesis? How would you change your experiment? What would your next experiments be?