Factors That Affect Photosynthesis

Question 1

what is rate of reaction

Answer 1

the rate at which reactant is used up or the rate at which the product is formed

Question 2

what are the three limiting factors of photosynthesis

Answer 2

• temperature
• CO2 concentration
• light intensity

Question 3

how does CO2 concentration affect the rate of photosynthesis

Answer 3

• CO2 is one of the raw materials needed for photosynthesis
• increasing CO2 concentration increases rate of photosynthesis to a point
• on a graph, the line flattens out, showing that CO2 is no longer a limiting factor

Question 4

how does light intensity affect the rate of photosynthesis

Answer 4

• without enough sunlight, a plant cant react quickly no matter how much CO2 there is
• this is because light transfers the energy needed for photosynthesis
• increasing light intensity boosts the rate of photosynthesis
• eventually the line would flatten out on a graph, indicating temp or CO2 level is the limiting factor

Question 5

how does temperature affect the rate of photosynthesis

Answer 5

• if it gets too hot or cold, the rate of photosynthesis will be low
• but it increases as you reach the middle
• this is because the enzymes in a plant that carry out photosynthesis have an optimum temperature in which that can react the quickest
• temperatures too high denatures them so they dont react as quickly
• and temps too low cause the enzymes to work more slowly

Question 6

what is the inverse square law equation

Answer 6

light intensity (inversely proportional to) 1 / distance^2

Question 7

what is the inverse square law

Answer 7

the law saying that the light intensity is inversely proportional to the square of the distance form the light source

Question 8

numeral example of the inverse square law

Answer 8

• distance = 1m, so light intensity = 1
• distance = 2m, so light intensity = 1 /4
• distance = 3m. so light intensity = 1 / 9
• its the distance squared, over 1

Question 9

why is the rate of photosynthesis inversely proportional to the distance of the light source

Answer 9

because the the more the distance of the light source increases, the more the rate of photosynthesis decreases

Question 10

what is the symbol for light intensity

Answer 10

lux / lx