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The Water
Cycle
•Describes the movement of water on, in,
and above the earth
•Water is always changing and moving from
one place to another
•This cycle is made up of a few main parts:
•Precipitation
•Infiltration
•Runoff
•Transpiration
•Evaporation
•Water Vapor
•Condensation
•Collection
•The repeating change of
water on the Earth creates
a cycle
• As water goes through its
cycle, it can be a solid (ice),
a liquid (water), or a gas
(water vapor)
•Ice can change to become
water or water vapor
•Water can change to
become ice or water vapor
•Water vapor can change to
become ice or water.
• Happens when the temperature and the atmospheric pressure
are right
• The small droplets of water in clouds form larger droplets and
precipitation occurs. The raindrops fall to earth.
• Occurs when so much water has condensed that the air cannot
hold it anymore
• The clouds get heavy and water falls back to the earth in the
form of rain, hail, sleet or snow
• Click the speaker below to hear rain falling
•Rain:
Sleet:
•Snow:
Hail:
•Important process where
rain water soaks into the
ground, through the soil
and underlying rock layers
•The flow of water from the
ground surface into the
ground
•Once infiltrated, the water
becomes soil moisture or
groundwater
•Movement of water underground is called groundwater flow
•Groundwater slowly moves through the spaces and cracks
between the soil particles on its journey to lower elevations
•The movement of land water to the oceans, mainly in
the form of rivers, lakes, and streams
•Consists of precipitation that neither evaporates,
transpires nor penetrates the surface to become
groundwater
•Excess runoff can lead to flooding, which occurs when
there is too much precipitation
• Process that happens through plants
• As plants absorb water from the soil, the water moves
from the roots through the stems to the leaves
• Once the water reaches the leaves, some of it
evaporates from the leaves, adding to the amount of
water vapor in the air.
• The process where a liquid, in this case water,
changes from its liquid state to a gaseous state.
• The sun heats up water in rivers or lakes or the
ocean and turns it into vapor or steam.
• The water vapor or steam then leaves the river,
lake, or ocean and goes into the air.
• Water in its gaseous state-instead of liquid
or solid (ice)
• Totally invisible
• Extremely important to the weather and
climate
– Without out it, there would be no clouds or
rain or snow
– All of the water vapor that evaporates from
the surface of the Earth eventually returns as
precipitation - rain or snow
•Formation of liquid drops from water vapor
•Occurs when a parcel of rising air expands and cools
•Responsible for the formation of clouds
•These clouds may produce precipitation, which is the
primary route for water to return to the Earth's surface
within the water cycle
• When water falls back to earth as precipitation, it
may fall back in the oceans, lakes or rivers or it
may end up on land
• When it ends up on land, it will either soak into
the earth and become part of the “ground water”
that plants and animals use to drink.
• It may run over the soil and collect in the
oceans, lakes or rivers where the cycle starts all
over again.
•Adding or subtracting heat makes the cycle work.
•If heat is added to ice, it melts. If heat is added to water, it
evaporates.
•Evaporation turns liquid water into a gas called water vapor.
If heat is taken away from water vapor, it condenses.
• Condensation turns water vapor into a liquid.
•If heat is taken away from liquid water, it freezes to become
ice.
• Humans use water for drinking, respiration,
perspiration, and elimination of wastes are
all part of this cycle
• Large amounts of water are needed for
most economic activities: agriculture and
mining, food processing, manufacturing
• Lakes and rivers provide towns and cities
with a means of discharging wastes
• Generation of electricity from thermal power
plants
• Waterways provide transportation
• Recreational activities
• Some people view the rivers and large lakes
of this country as a part of their own identity
• AND MUCH MORE!!!
Click the link below
http://www.youtube.com/watch?v=_1oCoKj7b2o
Click the link below to sing about the water cycle.
http://www.teachertube.com/view_video.php?viewkey=53bdf2518c53ddf3bce6
•The water cycle is called the hydrologic
cycle. In the hydrologic cycle, water from
oceans, lakes, swamps, rivers, plants, and
even you, can turn into water vapor.
•Water vapor condenses into millions of
tiny droplets that form clouds.
• Clouds lose their water as rain or snow,
which is called precipitation.
•Precipitation is either absorbed into the
ground or runs off into rivers.
•Water that was absorbed into the ground
is taken up by plants.
• Plants lose water from their surfaces as
vapor back into the atmosphere.
• Water that runs off into rivers flows into
ponds, lakes, or oceans where it
evaporates back into the atmosphere.
•The cycle continues.
Lets label the Water Cycle together!
Condensation
Evaporation
Precipitation
Runoff
Infiltration
Groundwater flow
• The Water Cycle. Enchanted Learning. 19992008.
http://www.enchantedlearning.com/subjects/astr
onomy/planets/earth/watercycle.shtml
• Water Cycle. Wikipedia. 2008.
http://en.wkipedia.org/wiki/water_cycle
• The Water Cycle. DLTK’s Sights. 1998-2007.
http://www.kidzone.ws/water/
• You Tube. http://www.youtube.com/