Water Movement

1. © 2004 Plano ISD, Plano, TX

2. © 2004 Plano ISD, Plano, TX
WaterWater
is necessary for plant survival.
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3. © 2004 Plano ISD, Plano, TX
moves from soil through roots
contains mineral nutrients
necessary for plants to thrive
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4. © 2004 Plano ISD, Plano, TX
continues in a
continuous column
evaporates
through stomata
roots  stem
stem  leaf
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5. © 2004 Plano ISD, Plano, TX
evaporates
through stomata
roots  stem
stem  leaf
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6. © 2004 Plano ISD, Plano, TX 6
stomata

7. © 2004 Plano ISD, Plano, TX
The evaporation of water from
leaves through the stomates is
transpiration.
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8. © 2004 Plano ISD, Plano, TX
How is transpiration
affected by
deforestation in the
tropical rainforests?

9. © 2004 Plano ISD, Plano, TX
Where the tropical rain forests of
the world are concerned, clearing 27
million acres/year to create grazing
land for cattle has a serious impact
on the worldwide weather pattern.
Therefore, when these plants are
removed, the amount of water they
release to the atmosphere is also
removed.

10. © 2004 Plano ISD, Plano, TX
Water moves
up a
continuous
column of
hollow cells
called
Xylem tissue runs
continuously from
roots  stems 
leaves.
xylem.
xylem
xylemxylemxylem
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11. © 2004 Plano ISD, Plano, TX
Cohesion and adhesion
are two of several factors that
help regulate the movement of
water through a plant.
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12. © 2004 Plano ISD, Plano, TX
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+ +
_
Because a water
molecule is polar, it
can attract like and
unlike molecules.
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+ +
_
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HHHH++
_
O
HH
HH +
+
_
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HH
HH
+
+
_
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HH
+
+
_
Water sticking to
water is cohesion,
the attraction of
like molecules to
each other.
cohesion, the
attraction of like
molecules to each
other.
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13. © 2004 Plano ISD, Plano, TX 13
The strong attraction water
molecules have to each other
(cohesion) and to the walls of
xylem tubes (adhesion) results in
a process called
capillary action.

14. © 2004 Plano ISD, Plano, TX
Capillary action and
transpiration are two of the
processes needed to keep
water moving through a
plant.
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15. © 2004 Plano ISD, Plano, TX

16. © 2004 Plano ISD, Plano, TX
What will happen when one end of a dry
string is put in a beaker with water and
the other end is put in an empty beaker?
Water sticking to water is _______.
Water sticking to string is _______.
cohesion
adhesion
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17. © 2004 Plano ISD, Plano, TX
Identify this process.What is the purpose of this process?
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18. © 2004 Plano ISD, Plano, TX
xylemxylemxylem
What two forces are
involved in this process?
What is this process called?
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19. © 2004 Plano ISD, Plano, TX
Bibliography
Gibson, Matthew. ( ____ ). Transportation in plants.
http://www.iit.edu/~smile/bi9703.html
Water ya know about dat? (1996 ). Water Lesson. Utah State Office of Education: Salt
Lake City. [Online]. Available:http://www.wested.org/werc/earthsystems/water/wateryah
know.html
Kotz, John C. and Purcell, Keith F. (1991). Chemistry and chemical reactivity.
Ft. Worth, Texas: Harcourt Brace Jovanovich College Publishers.
Transpiration in Plants (1996 ). Rain Forest Teaching Module. Rain Bird Sprinkler Mfg. Corp:
[Online]. Available: http://www.rainbird.com/rainforest/9-12_transpiration.htm