B1.4.3 - Factors Affecting Photosynthesis Flashcards
What are the limiting factors that affect the rate of photosynthesis?
Light intensity
Carbon dioxide
Temperature
What are limiting factors?
Factors that can limit something down
How can you measure the rate of photosynthesis?
By measuring how much glucose and food a plant makes in a given time, or how much biomass the plant has increased in
What is glucose also used for in plants?
Creating new cells
Why does checking the increase in biomass calculate the rate of photosynthesis?
Because the glucose produced creates new cells, which increases the biomass of the plant
What is the equation in order to find the rate of something?
1 / time = 1/time (hour,min,sec) to the power of -1
What does the t in the rate of photosynthesis equation represent?
Time
If the light intensity is high, will the rate of photosynthesis be high or low?
It will be high
What happens if the light intensity is higher than the plant’s maximum reaction rate?
The plant will continue to photosynthesise at its maximum rate of reaction
If the carbon dioxide concentration is low in photosynthesis, will the rate of the reaction be high or low?
High
How much carbon dioxide does the atmosphere contain as a percentage?
0.04%
What does carbon dioxide’s scarcity suggest about photosynthesis?
It means that usually carbon dioxide is the most common limiting factor
Why do farmers artificially increase the amount of carbon dioxide in greenhouses?
So the plants can take in a higher carbon dioxide concentration and photosynthesise more
If the temperature is high, will photosynthesis be slower or quicker?
Quicker
What happens if the temperature is too high?
The rate of reaction slows down drastically
