Earth’s Water Reservoirs. Introduction What do you think of when you hear the word reservoir?...

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Earth’s Water Reservoirs

Transcript of Earth’s Water Reservoirs. Introduction What do you think of when you hear the word reservoir?...

Page 1: Earth’s Water Reservoirs. Introduction What do you think of when you hear the word reservoir? Living in Utah, most of us will think of a man made lake.

Earth’s Water Reservoirs

Page 2: Earth’s Water Reservoirs. Introduction What do you think of when you hear the word reservoir? Living in Utah, most of us will think of a man made lake.

IntroductionWhat do you think of when you hear the word

reservoir? Living in Utah, most of us will think of a man made

lake that stores needed water. Many of us have been swimming, fishing, or boating at these reservoirs. Many places in the country and around the world do not have these reservoirs though.

A reservoir is a place where substances are stored as part of a cycle.

The water cycle has many places where water is stored. Name as many natural (not man-made) reservoirs of the water cycle as you can think of in your science journal:

Page 3: Earth’s Water Reservoirs. Introduction What do you think of when you hear the word reservoir? Living in Utah, most of us will think of a man made lake.

Hypothesis

• Using the reservoirs you wrote in your science journal, create a pie chart of the amount of water you think is in each reservoir.

• Your pie chart needs one section for each reservoir you listed in your science journal.

• Each section should have a different color or pattern to it. • Be sure to create a key. • Also write what percentage of the water cycle each reservoir

makes up. • Remember that this is just a hypothesis, so be brave and

take an educated guess.

Page 4: Earth’s Water Reservoirs. Introduction What do you think of when you hear the word reservoir? Living in Utah, most of us will think of a man made lake.

Actual DataReservoirs Percentages Fraction

Oceans 97% 97/100

Icecaps/Glaciers

2% 2/100

Groundwater .7% .7/100 or 7/1000

Atmosphere .01% .01/100 or 1/10,000

Freshwater Lakes .3% .3/100 or 3/1,000

Saline lakes and inland seas

.01% .01/100 or 1/10,000

Rivers .001% .001/100 or 1/100,000

Amount of water in Each Reservoir

• Create the actual pie chart of the reservoirs of the water cycle using the percentages to the right

• You need to have a key

• Write the percentages on the outside of your chart.

Page 5: Earth’s Water Reservoirs. Introduction What do you think of when you hear the word reservoir? Living in Utah, most of us will think of a man made lake.

Questions1. What percentage of the world’s water is salt water? 2. What percentage of the world’s water is in ice caps

or glaciers? 3. What percent does that leave for fresh water? 4. With so much water in the world, why do we worry

about water shortages? 5. Why would salt water have limited use to humans? 6. What surprised you about your hypothesis and the

actual data? 7. Compare the two pie charts that you created. What

about your hypothesis chart was correct?

Page 6: Earth’s Water Reservoirs. Introduction What do you think of when you hear the word reservoir? Living in Utah, most of us will think of a man made lake.

What Reservoirs do we have in Utah?LakesRivers/streamsMan-made reservoirsPrecipitation

SnowRain

GroundwaterAlpine glaciers (become more rare)

Page 7: Earth’s Water Reservoirs. Introduction What do you think of when you hear the word reservoir? Living in Utah, most of us will think of a man made lake.

Group Activity

Page 8: Earth’s Water Reservoirs. Introduction What do you think of when you hear the word reservoir? Living in Utah, most of us will think of a man made lake.

QuestionHow does water enter and from where?How long does it stay?How does it exit the reservoir and where

does it go?How does it change the landscape?How does it affect biotic factors?


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