Transcript Earth Science: Condensation and Evaporation

Earth Science Grade 5:
Condensation and Evaporation
Lisa Kirk
EED 602 (online)
Grade 5, Standard Set 3: Earth’s Water
3. Water on Earth moves between the oceans and
land through the process of evaporation and
condensation.
Students know:
a. Most of Earth’s water is in the oceans, which cover most of Earth’s surface.
b. Liquid water evaporates, turns into water vapor and back into a liquid when
cooled or as a solid if cooled below the freezing point of water.
c. Water vapor in the air moves and can form fog or clouds, and can fall to Earth as
rain, hail, sleet, or snow.
d. The amount of fresh water located in rivers, lakes, underground
sources, and glaciers is limited and that its availability can be extended
by recycling and decreasing water use.
e. The origin of the water used by their local communities.
Evaporation, Condensation and Precipitation:
The main processes of the water cycle
Click on the picture to find out more!!!
Evaporation
 The transformation of a liquid into a gas.
 The sun’s heat raising the temperature of
water and turning it into a gas.
 Water from earth’s rivers, and oceans that is
heated and travels through the air as a gas.
Stages of Evaporation
1. Water is warmed
by the sun
2. As the water
heats, it turns
into a gas.
3. Water particles rise as a gas
or vapor
Condensation
 Water vapor particles rising through the air.
 You can't see it, but air contains a lot of water.
 When air gets cold, the water vapor condenses
into clouds.
 Warm air can hold more water vapor than cold air.
– When warm air holds a lot of water vapor, the air feels
sticky and damp.
 The amount of water in the air is called humidity.
The Stages of Condensation
1. Water vapor particles rising
2. Particles forming groups
3. Water particles grouped to form bonds
Precipitation is…
 …the process by
which water falls back
down to earth as rain,
snow, or hail.
 Depending on the
temperature, water
may fall to earth as:
– liquid (rain),
– semi-solid (snow),
– solid (hail)
QuickTime™ and a
YUV420 codec decompressor
are needed to see this picture.
Distribution of Water on Earth
Click on the graph to learn more!
 Most of the Earth’s water is in oceans.
 Oceans contain salt water and covers most of the earth’s
surface.
 Of the final 1%, only 4/10 of water comes from rivers, a
major source of the water we use.
Where is the Water We Use?
California Water Sources and Usage
 Much of the water we depend on in Southern California
comes from sources located in the northern part of the state.
What is Fresh Water Used For?
Recycle and Conserve Water!

Reclaimed waste water
frees up fresh water that
can be used for drinking
water

California is a good place
to how reclaimed waste
water is being used

The East Bay Municipal
Utility District water
reclamation project saves
about 5.5 billion gallons
per year
Bibliography
 http://www.balladtree.com/water.html
 http://www.cde.ca.gov./board/pdfscience.pdf
 http://www.ladwp.com/watersupply/rec
 http://www.metaphor.no/samples_flythrus.html
 http://www.naturegrid.org.uk/rivers/graphics/wcmin
i-ev.gif
 http://www.schoelles.com/water
 http://www.sesd.org/tech/grade5/science
 http://ga.water.usgs.gov/edu/waterproperties.html