Photosynthesis 1.3

Question 1

What can the rate of photosynthesis be assessed using?

Answer 1

Hydrogencarbonate indicator

Question 2

When does hydrogencarbonate indicator change the colour?

Answer 2

Depending on the concentration of carbon dioxide and resulting PH solution

Question 3

What forms algal balls?

Answer 3

Green algae immobilised in alginate beads

Question 4

Controlled variables in this experiment?

Answer 4

Number of algal balls
Length and time each vial is exposed to light
Temperature

Question 5

What is the conclusion of this experiment if the distance of the light source increases?

Answer 5

PH turns yellow because the rate of photosynthesis decreases
CO2 conc increases
PH decreases

Question 6

What is the conclusion if the distance of the light source decreases

Answer 6

Indicator turns purple
Rate of photosynthesis increases
CO2 conc decreases
PH increases