photosynthesis

Question 1

what is photosynthesis

Answer 1

chemical process used by plants to make glucose and oxygen from carbon dioxide and water using light energy

Question 2

what happens to the glucose produced in photosynthesis

Answer 2

respired to release energy, converted to starch for storage,used to make cellulose proteins and oils

Question 3

photosynthesis word equation

Answer 3

carbon dioxide plus water equals oxygen plus glucose

Question 4

what are the limiting factors of photosynthesis

Answer 4

temperature
light intensity
carbon dioxide concentration

Question 5

light intensity experiment

Answer 5

a light is recorded at different lengths from a photosynthesising plant to vary the intensity it receives
the further it moves from the plant the fewer oxygen bubbles produced
count bubbles or messing volume of oxygen is more accurate

Question 6

how to test leaf for the presence of starch

Answer 6

heat leaf in boiling water
and leaf to boiling ethanol to dissolve the chlorophyll turning it white
wash leaf
add iodine
leaves w starch present will turn blue/black

Question 7

the use of sodium hydroxide to absorb carbon dioxide for photosynthesis

Answer 7

sodium hydroxide absorbs and removes co2
plant is left in bag w sodium hydroxide, test leaves w iodine, it won’t turn blue/black bc the plants has not photosynthesised therefore no starch is produced and stored

Question 8

what does chlorophyll do

Answer 8

absorbs light energy