Transcript File
IT’S A
GREEN WORLD
Transport in plants
Starter
What weather conditions make a good
drying day?
Transport in plants
Learning objectives
Success criteria
Students should understand :
Describe and explain
the factors that affect
the transpiration rate.
the effects of different
conditions on the rate of
transpiration
Understand how some
species are adapted to
reduce water loss by
transpiration.
be able to describe how
this can be measured in
experiments
relate plant structure to
environmental conditions
Transpiration
Water moving through a plant is a bit like the way
you drink liquid through a straw.
It is ‘sucked’ up from the top, with liquid being
replaced at the bottom.
A plants environment affects the
rate of transpiration:
light intensity
temperature
air movement (wind).
humidity (amount of moisture in the air)
Why does transpiration rate vary?
For each slide note down how these factors affect the
rate of transpiration.
Task
Complete worksheet B4c5 -Plants and their locations
Leaf A is a normal leaf.
Leaf B is a grass leaf because it has stomata on
both surfaces; there are no upper and lower
surfaces in a leaf that grows vertically.
Leaf C is a water lily leaf because it has stomata on
the upper surface; if they were in the lower
surface the leaf would become water logged and
unable to transpire.
Leaf D is a cactus leaf because it is shaped as a
spine and has few stomata to reduce water loss.
Leaf E is a heather leaf because it has sunken
stomata to reduce water loss.
Leaf F is a Marram grass leaf because it has special
adaptations to reduce water loss, i.e. curled
leaves, hairs to trap moisture.
Plenary
Transport in plants
Learning objectives
Success criteria
Students should understand :
Describe and explain
the factors that affect
the transpiration rate.
the effects of different
conditions on the rate of
transpiration
Understand how some
species are adapted to
reduce water loss by
transpiration.
be able to describe how
this can be measured in
experiments
relate plant structure to
environmental conditions