B1.4

Question 1

how do you calculate relative light intensity?

Answer 1

1/ distance^2 = LUX

Question 2

what type of reaction is photosynthesis?

Answer 2

endothermic as it takes in light energy

Question 3

symbol equation for photosynthesis

Answer 3

6H2O + 6CO2 –> C6H12O6 + 6O2

Question 4

chloroplasts

Answer 4

site of photosynthesis, contains chlorophyll which traps light for photosynthesis

Question 5

stages of photosynthesis

Answer 5

1. (light dependent phase) light is used to split the water molecules
2. (not light dependent stage) carbon dioxide, hydrogen and oxygen combine to make glucose

Question 6

what do plants use glucose for?

Answer 6

-respiration
-to make cellulose (cell walls)
-stored as starch
-converted to fructose and stored in fruits

Question 7

limiting factors of photosynthesis

Answer 7

-temperature
-CO2 concentration
-light intensity

Question 8

when you add iodine to a leaf what colour should it turn if it’s photosynthesized?

Answer 8

black