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OUR MOST
PRECIOUSRESOURCE
WAT ER
Sandra KnechtAlyson Roth
Kiana Dumas
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T H E F O U N D AT I O N
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L O R E N E I S E L E Y,T H E I M M E N S E J O U R N E Y ( 1 9 5 7 )
Its substance reaches everywhere; it touches thepast and prepares the future; it moves under the
poles and wanders thinly in the heights of air. It can
assume forms of exquisite perfection in a snowflake,
or strip the living to a single shining bone cast up by
the seaIf there is magic on this planet, it is
contained in water.
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H 2 O I S A U N I Q U E M O L E C U L E W I T H S O M EA M A Z I N G P R O P E R T I E S
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Molecular Structure of H2O
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H - B O N D S A N D P O L A R I T Y
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C O H E S I O N
Water molecules
are attracted to
each other
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A D H E S I O N
Water
molecules are
attracted to
other
substances
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C A P I L L A R Y
A C T I O N
Capillary action
allows liquid to flow
upward
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3 P H Y S I C A L S TAT E S O F H 2 O
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I C E I S L E S S D E N S E T H A N W AT E R
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H I G H S P E C I F I C
H E AT A N D
T E M P E R A T U R E
R E G U L A T I O N
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E X PA N D I N G T H E C O N C E P T
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H 2 O
The most abundant
compound on the planet
Composes 60-70% of
human body
Essential for all living
organisms
You can survive less than a
week without it
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T H E U N I Q U E C H E M I C A L A N D P H Y S I C A L
P R O P E R T I E S O F W AT E R M A K E I T E S S E N T I A L
F O R L I F E
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N O W AT E R =
N O C E L L S
Osmosis
Fluid homeostasis
Chemical cellular reactions
Transportation of oxygen
and waste
Sustains cellular structure
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T H E R O L E O F
W AT E R I N T I S S U E S
A N D O R G A N S
All body tissues contain water in
different amounts
Kidney regulates water and
waste removal
Heart directly affected by water
intake - blood pressure and
blood volume
Water intake affect cognitive
functions
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T H E B I G P I C T U R E
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Water -
the simplest substance
vital to our survival
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water > plants > animals
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Water is removed
from the
body in many ways.
Keep yourself
hydrated!!!
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W AT E R I S A F I N I T E R E S O U R C E
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Most freshwater is stored in inaccessible places
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Rivers and lakes make up 1% of all freshwater.
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Population Distribution
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Water consumption has doubled
over the last decade
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W AT E R A N D D I S E A S E
21 of 37 primary
diseases in
developing
countries are related
to water andsanitation
Inadequate water
causes health
problems for 1.2
billion people
worldwide
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Converting salt water to drinking water is extremely
expensive
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Evett J, Khler K. Water conservation. Salem Press Encyclopedia [serial on the Internet]. (2015,January), [cited September 23, 2015]; Available from: Research Starters.
Jquier E, Constant F. Water as an essential nutrient: the physiological basis of hydration.
European Journal Of Clinical Nutrition [serial on the Internet]. (2010, Feb), [cited
September 23, 2015]; 64(2): 115-123. Available from: Academic Search Complete.
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E, Nandagopal S. 2004. Water resources: Agricultural and environmental issues.
BioScience 54: 909918.
Sivakumar B. Water crisis: From conflict to cooperation-an overview. Hydrological Sciences
Journal/Journal Des Sciences Hydrologiques [serial on the Internet]. (2011, June), [citedSeptember 23, 2015]; 56(4): 531-552. Available from: Academic Search Complete.
Srinivasan V, Lambin E, Gorelick S, Thompson B, Rozelle S. The nature and causes of the global
water crisis: Syndromes from a meta-analysis of coupled human-water studies. Water
Resources Research [serial on the Internet]. (n.d.), [cited September 23, 2015];
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