BTB Color and Photosynthesis Rate
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Objective
I can relate changes in BTB color to the rate of photosynthesis.
Part 1 of 4
Warm-up video
LabXchange · 8:09
We don't generate video — this one is by LabXchange on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
Photosynthesis is the process where plants use energy from the sun to convert water and carbon dioxide into sugars, releasing oxygen in the process.
- 2
In the leaf disk assay, leaves are infiltrated with water under a vacuum to make them sink, and then the rate at which they float again due to oxygen production is measured to estimate photosynthetic rate.
- 3
A control group without carbon dioxide is used to compare against the experimental group with carbon dioxide, ensuring that any observed flotation is due to photosynthesis.
Part 3 of 4
Practice
12 questions
What two main ingredients do plants use during photosynthesis?
What gas is produced during photosynthesis?
Part 4 of 4
Exit ticket
Quick comprehension check
“In the leaf disk experiment, what color would the solution be if photosynthesis is occurring at a high rate, and why?”
Sample answer included in the free materials
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Teacher guide, student handout, and slides — free, in Google Docs format
Teacher Guide
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