Transcript Water Cycle - Cloudfront.net

Are you really drinking the same water as the caveman?
Water Cycle
 Water is always on the move.
Rain falling where you live may
have been water in the ocean
just days before. And the water
you see in a river or stream
may have been snow on a high
mountaintop.
 The water cycle is also known
as the hydrologic cycle.
 Fun Fact:

Hydro is Latin for water
Where is water?
 Water can be in the
atmosphere, on the land, in
the ocean, and even
underground. It is recycled
over and over through the
water cycle.
 In the cycle, water changes
state between liquid, solid
(ice), and gas (water vapor).
Stage 1 : Evaporation
 Evaporation is the change from liquid to
vapor form.
 Evaporation turns the water that is on the
surface of oceans, rivers, & lakes into water
vapor using energy from the sun.
 What type of energy transfer is taking
place?
Stage 1 : Transpiration
 When water evaporates from plants it is a
process called transpiration.
 Plants lose water through their stems,
leaves, and roots.
 A fully grown tree may lose several
hundred gallons of water through its
leaves on a hot, dry day.
Stage 2: Condensation
 Condensation is the process by which water
vapor in the air is changed into liquid water.
 The water vapor rises in the atmosphere and
cools, forming tiny water droplets by a
process called condensation.
 Those water droplets make up clouds.
Stage 3: Precipitation
 Those water droplets that CONDENSE
make up clouds. If those tiny water
droplets combine with each other they
grow larger and eventually become too
heavy to stay in the air. Then they fall to
the ground as rain, snow, and other types
of precipitation.
Stage 3: Precipitation
 Precipitation is water released from clouds
in the form of rain, freezing rain, sleet,
snow, or hail. It is the primary way water is
delivered from the atmosphere to the Earth.
Did you know…
 How many gallons of water fall when 1 inch (2.5 cm) of
rain falls on 1 acre of land?
 27,154 gallons of water!
 Rain drops are not tear shaped.
 They start out in a ball shape, but as they fall they meet with air
resistance, which starts to flatten out the drop until at about 2-3
mm in diameter the bottom is quite flat with an indention in the
middle - much like a hamburger bun. When raindrops reach about
4-5 mm, things really fall apart. At this size, the indentation in the
bottom greatly expands forming something like a parachute with
two smaller droplets at the bottoms. The parachute doesn't last
long, though, and the large drop breaks up into smaller drops.
Wow! That is amazing!
 The world's record for average-annual rainfall belongs
to Mt. Waialeale, Hawaii, where it averages about 450
inches (38 ft) per year.
 The world’s recorded for least amount of rain goes to
Antofagasta Region, Atacama Desert, Chile at 0 in one
year!
 It takes 6 gallons of water to grow the potatoes for your
order of fries!
 For your hamburger it takes 1300 gallons of water to
produce everything needed!
Stage 4: Runoff
 The variety of ways by which water moves
across the land.
 As it flows, the water may seep into the
ground, evaporate into the air, become
stored in lakes or reservoirs, or be extracted
for agricultural or other human uses.
Stage 4: Infiltration
 Some of the precipitation seeps into the
ground and becomes a part of the
groundwater.
 That seepage is called infiltration.
 Example – Edwards Aquifer
Stage 5: Accumulation
 The process in which water pools in large bodies
(like oceans, seas and lakes) Most of the water on
Earth is in the Ocean.
 Did you know?
 Water stays in certain places longer than others.
A drop of water may spend over 3,000 years in
the ocean before moving on to another part of
the water cycle while a drop of water spends an
average of just eight days in the atmosphere
before falling back to Earth.