Transcript Investigation 6 PPT

TRANSPIRATION
• The process by which water is
given off from plants through
evaporation
ENDURING
UNDERSTANDING
• A vascular system
transports water
throughout a plant and the
leaves regulate the flow of
water through a plant.
LEARNING GOAL
• I will design an experiment to determine what
happens to water in a celery stalk.
• I will prepare and study a leaf peel to discover
stomates.
• I will cover the foliage of a plant with a plastic
bag to observe condensation - evidence of
transpiration.
• I will describe how water enters a plant's roots
and flows through the plant during
transpiration.
• I will explain how stomates open and close to
regulate the rate of transpiration.
• I will describe transpiration as a component of
the water cycle.
WORD BANK
• Variable- what you change in
an experiment
• Control- the standard to which
an experiment is compared. It
is not subjected to the variable
(the change).
• Controlled Experiment- only
one variable is being tested.
WORD BANK
• Xylem- the tubelike structures
that carry water from the roots
throughout the plant.
• Stomates- pores or holes in the
leaves that open and close to
regulate the amount of water
passing out of the plant.
• Guard Cells- control the size of
the openings on leaves.
REVIEW
• What happened
when celery was
put in water?
–Water level?
–Where did it go?
TRANSPIRATION
• The process when water
passes through a plant
from the roots, to the
vascular channels, to the
xylem, to the leaves, and
then to the stomates.
Transpiration ensures that
water will be flowing to
every cell in the plant at all
times!
DROUGHT
• When water is scarce (not
much around), like in the
desert, the guard cells on
the stomates close to
reduce the rate of
transpiration. When water
is plentiful (lots), the
stomates open and water
moves through the plant
more quickly.
IS WATER PASSING
THROUGH THE
PLANT?
• It seems like a lot of water
passes through the plant.
How can we capture some
of the water to confirm that
it is really passing through.
• Think about the video we
watched 
EXPERIMENT AND
MATERIALS
• We will go
outdoors
to find a
plant and
see if water
is passing
through it.
• Clear bag
• Labels
• Rubber
band
• Scale
• Gram
pieces
PROCEDURE
1.Weigh the bag.
2.Label your bag.
3.Go outside and find a dry
plant to put your bag over.
4.Thursday we will observe.
• What will we look for on
Thursday as evidence of
Transpiration?