measuring the rate of transpiration - potometer

Question 1

how to set up a potometer

Answer 1

set up underwater
cut the stem
shoot stem in bung
grease joint w jelly (no air entry/water loss)
bung in potometer
tap closed full of water
lift potometer out of water
leave end of capillary tube out of water until air bubble forms & then put in beaker of water
measure rate as distance bubble travelled in 5 mins

Question 2

a potometer is to measure

Answer 2

measure the rate of water uptake from a leafy shoot

Question 3

!! we can use potometer to collect readings in normal air or windy conditions by

Answer 3

using a hairdryer on cold

Question 4

!! we can use potometer to collect readings in temperature

Answer 4

increases and decreases

Question 5

!! we can use potometer to collect readings in increased humidity by

Answer 5

using a clear plastic bag

Question 6

!! we can use potometer to collect readings by changing the l & d

Answer 6

lightness and darkness

Question 7

changing the environmental factors stimulates

Answer 7

all the different conditions which affect the rate of transpiration