Resources Required For Photosynthesis Flashcards
List the resources required for photosynthesis.
3
Light
Carbon dioxide
Water
What is the normal source of light for photosynthesis?
Sunlight is the normal source of light for photosynthesis
Describe the need for light during photosynthesis.
Light intensity levels must be of sufficient strength to allow photosynthesis to proceed
How is the amount of light measured?
The amount of light is measured as light intensity
What are the two sources of carbon dioxide for photosynthesis?
An external source - CO2 in the atmosphere
An internal source - respiration
What is the external source of carbon dioxide for photosynthesis?
Carbon dioxide in the atmosphere
What is the internal source of carbon dioxide for photosynthesis?
Respiration
Describe how the atmosphere is a source of CO2 for photosynthesis.
Most of the carbon dioxide that a plant uses in photosynthesis enters the leaf from the atmosphere
Where does carbon dioxide enter the plant from the atmosphere?
Through the leaf
Describe how respiration acts as a source of CO2 for photosynthesis.
Some of the CO2 used in photosynthesis is produced by the leaf cells during respiration
What part of the plant produces CO2 during respiration?
The leaf cells
Describe the amount of CO2 available to plants
The amount of CO2 available to a plant is relatively low
Why is the amount of CO2 available to plants relatively low?
The amount of CO2 available to a plant is relatively low due to the low levels of CO2 in the atmosphere - only 0.04 %
What percentage of our atmosphere is carbon dioxide?
0.04 %
What happens if there are low levels of carbon dioxide in a plant?
This will slow the rate of photosynthesis
