Potometer

Question 1

first step Cut a shoot………….

why does this happen

Answer 1

Cut a shoot underwater

This is done to prevent air from entering the xylem

Question 2

step 2

Place the shoot in the ………

Set up the …………as shown in the diagram

Make sure it is ………….., using vaseline to seal any gaps

If air enters the apparatus then………

Answer 2

tube

apparatus

airtight

readings will be affected

Question 3

third step Dry the ……………of the shoot

why

Answer 3

Dry the leaves of the shoot

Any moisture present on the leaves will affect the rate of transpiration

Question 4

step 4
Remove the capillary tube from the beaker of water to allow a ………….. then place tube back to…………

Answer 4

single air bubble to form and place the tube back into the water

Question 5

step 5 Set up the environmental factor you are investigating

Allow the plant to adapt to the new environment for

Answer 5

5 mins

Question 6

step 6

Record the ………. of the air bubble

Leave for a set period of time

Record the ,…. of the air bubble

Answer 6

starting location

end location

Question 7

step 7Change the…………….investigated

Answer 7

variable

Question 8

step8 Reset the bubble by

Answer 8

opening the tap below the resvoir

Question 9

do repeats

Question 10

The further the bubble travels in the same time period, the faster

Answer 10

transpiration is occurring and

Question 11

Environmental factors can be investigated in the following ways:

wind intensity

temperature

humidity

ligjt intensity

Answer 11

Airflow: Set up a fan or hairdryer change distance

Humidity: Spray water in a plastic bag and wrap around the plant

Light intensity: Change the distance of a light source from the plant

Temperature: Temperature of room (cold room or warm room)

Question 12

Remember keep all the other factors the same except independent variable