Objective
The student will demonstrate an
understanding of Earth systems,
in relationship to the water cycle
Water Cycle Rap
http://www.youtube.com/watch?v=F9Yi4dAzHsc&safety_mode=true&persist_safety_mode=
1&safe=active
Predict the results of modifying
the Earth’s nitrogen, water and
carbon cycles
Lesson Objective
1. The student will summarize the
effects of human activity on the
water cycle: global climate
change, water quality and water
quantity
Hydrology
• is the study of the movement,
distribution, and quality of water
throughout the Earth, including the
hydrologic cycle and water resources.
A practitioner of hydrology is a
hydrologist, working within the fields of
either earth or environmental science,
physical geography, geology or civil
and environmental engineering.
Etomology
• The term hydrology is
from Greek: ὕδωρ, hydōr,
"water"; and λόγος, logos,
"study"
• The vast bulk of the water on Earth is
regarded as saline or salt water, with an
average salinity of 3.5‰, though this
varies slightly according to the amount
of runoff received from surrounding
land. In all, oceanic water, saline water
from marginal seas, and water from
saline closed lakes amounts to over
98% of the water on Earth is salt water.
Fresh Water
• 2% of the Earths Remaining water is
fresh water. Of that 2% tied up in
Glaciers, which account for about 75%
of the world's fresh water, and of this
the Antarctic ice sheet accounts for
about 85%. Therefore if you do the
math… only about 0.5% of the Earth’s
water is available for consumption…
and, when you think how much we
abuse and pollute our water…
Question
True of False: There is plenty of
water for human consumption
(potable water).
Lions Share??? To Us???
• Therefore if you do the
math… only about 0.5% of
the Earth’s water is available
for consumption… and,
when you think how much
we abuse and pollute our
water…
There is a limited supply of
potable water on earth.
Earth's Water Supply
• The Great Lakes hold 21 percent of the
world's surface fresh water.
• The Ogallala Aquifer, also known as the
High Plains Aquifer, and the World’s largest
fresh water lake is a vast yet shallow
underground water table aquifer located
beneath the Great Plains in the United States.
One of the world's largest aquifers, it covers
an area of approximately 174,000 mi²
(450,000 km²) in portions of the eight states of
South Dakota, Nebraska, Wyoming, Colorado,
Kansas, Oklahoma, New Mexico, and Texas.
Salt Water Intrusion
1. What is considered to be the Zone of
Depression at the bottom of the pipe of a
well system? And, give an example
2. Why is the salt water under the fresh
water?
3. What is the term used when fresh
water and salt water mix?
1. The cone shape, void of water, at the
bottom of the pipe, caused by the
change in pressure. Using a straw on a
milkshake. Cyclones. Hurricanes.
Tornadoes.
2. Salt water is more dense than fresh
water.
3. Brackish water.
The
Water Cycle
How does water move from
one place to another?
Evaporation, transpiration,
condensation, precipitation.
Engage
• Time to Draw
• My version of the Water Cycle
Extreme Water
Diminished Water Supply
Diminished Water Quality
Explore
The Environmental Protection Agency
• Answer the following questions
1. Where is water stored?
2. How does water move from one place to another?
3. What is infiltration?
4. What is runoff?
5. How does global warming affect the water cycle? Use
information about the effect of (a) the wet cycle and (b)
the dry cycle.
Explain
• Debrief
• Review questions related to the EPA water
cycle animated video clip
Where is water stored?
Water is stored in oceans, lakes,
rivers, and groundwater.
Water Cycle Multi Media
• Digital Video
• Pod Cast
What is infiltration?
Infiltration is water movement
between the spaces in the soil.
What is runoff?
• Runoff occurs
when water
flows over the
ground instead
of sinking into
the ground.
How does global
warming affect the water
cycle?
Include information about the
effect of:
a) The wet cycle
b) The dry cycle
Global warming intensifies the water cycle
because the earth’s surface is a little warmer and
this increases evaporation.
a). Where there is too much water, there is
more water infiltrating and more runoff. This
could cause flooding and negative effects on
plants and animals living in the area.
b). In areas away from a water source more
evaporation and transpiration could dry out the soil.
This could lead to lowered ground water supply, and
have negative effects on the plants and animals
living in the area.
Elaborate
Another Rap
• A running toilet can waste up to 200
gallons of water per day.
Evaluate/Turn It In
Discussion #5
• Summarize the effects of human activity
on the water cycle:
global warming,
water quality,
and quantity.
Acrostic water cycle poem
• Wondering about what a water cycle is?
• Alright, I’ll tell you. It’s a never-ending
natural sequence.
• The water cycle has several steps in it.
• Evaporation, which is when the heat of the
sun causes the water to evaporate.
• Right, let’s go to the next step.
• Condensation, the next step, is when the water
forms into a cloud.
• Yep, now to the third step which is precipitation, is
when it rains from the cloud.
• Cool, now it’s raining, the droplets fall on top of a
hill, and goes into the river. This is surface runoff.
• Let’s see, now the water soaks into the ground. This
is called infiltration
• Entering the ground, the water flow back into the
ocean, this is called discharge. After that, starts
over.
Water Cycle / Hydrological
Cycle Graffiti
• See Word Doc.
Creative Form
• Create : 2 – 4 minutes long. Pairs must have
the 3-C’s
– Rap
– Song
– Story… Adventure, action, vacation, spy…
– Poster…
– Poem
– Analogy writing
– Demonstration
– Shadow Box
– Other … approved by teacher
– Glogster