Biology B4 - photosynthesis
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22 Terms
what do plants use light for
their source of energy
how do plants trap light energy
photosynthesis
what type of reaction is photosynthesis
endothermic
what is an endothermic reaction
a reaction that takes in energy from its surroundings
Where does photosynthesis take place?
in the leaves of a plant
What green pigment is found in the chloroplasts?
chlorophyll
what is chlorophyll and how is it used
green pigment used to absorb light energy
what is the word equation for photosynthesis
Carbon dioxide + water --light--> glucose + oxygen
what is the chemical equation for photosynthesis
c02 + h20 ---> c6 h12 o6 + o2
how does light intensity effect photosynthesis
The rate of photosynthesis increases with light intensity.
what does it mean if the light intensity was limiting
photosynthesis was not as fast as it could've been because there was not enough light
light intentsity is a...
limiting factor
what happens if we keep increasing light intensity
rate of photosynthesis no longer increases & it levels off
when this happens is light intensity still the limiting factor
no
what could be the limiting factor
something else that is in short supply such as the level of carbon dioxide in the air
experimement can be repeated with carbon dioxide while keeping everything else constant.
what does the graph for increased carbon dioxide during photosynthesis look like
same as light intensity
as we increase the level of carbon dioxide...
the rate of photosynthesis increases
what does this tell us
carbon dioxide is the limiting factor
What happens to the rate of photosynthesis at a certain point?
The rate of photosynthesis no longer increases.
What does it indicate when the rate of photosynthesis no longer increases?
Carbon dioxide is no longer the limiting factor.
how does temperature effect photosynthesis
-as you increase temp, rate of photosynthesis increases
-If the temperature is too low, the enzymes needed for photosynthesis work more slowly
-If the plant gets too hot, the enzymes needed for photosynthesis will become denatured this happens at around 45 degrees