What is an Independent Variable?
The Variable that changes
What is a Dependent Variable?
The Variable that is measured
What is a Controlled Variable?
The Variable that stays the same
What are the factors that can limit the rate of Photosynthesis
Carbon Dioxide concentration
Temperature
Light Intensity
How to measure the rate of Photosynthesis?
Measure…….
Volume of carbon dioxide used over time
Mass of glucose produced over time
Volume of oxygen produced over time
If the Light Intensity increases, how does the rate of Photosynthesis react?
Increases
If the Light Intensity increase too much, how does the rate of Photosynthesis react?
Why?
Stays the same- Chloroplasts can’t work any faster
If the Carbon Dioxide concentration increases, how does the rate of Photosynthesis react?
Increases
If the Carbon Dioxide increases too much, how does the rate of Photosynthesis react?
Why?
Stays the same-Chloroplasts can’t work any faster
If the Temperature increases, how does the rate of Photosynthesis react?
Increases
If the Temperature increases too much, how does the rate of Photosynthesis react?
Why?
Decreases-too hot to function
How to ensure that experiments are reliable
Repeat & Compare
