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 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:
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.
Actual Data 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. Amount of water in Each Reservoir Reservoirs 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
EXTEND: Chart Earth s Water
Questions 1. 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?
What Reservoirs do we have in Utah? Lakes Rivers/streams Man-made reservoirs Precipitation Snow Rain Groundwater Alpine glaciers (become more rare and not a true source of water)
Earth s Water Developed the the GPM Education and Public Outreach Team NASA Goddard Space Flight Center
ENGAGE Riddle me this What runs and never gets tired? What runs and has no feet, roars but has no mouth? What lives in winter, dies in summer, and grows with its root downward through the air?
ENGAGE - KWL
EXPLORE: Water on Earth Predict: If the water in this 5 gallon bucket represents the water on Earth, how much do you think is in a form that is available to humans?
EXPLAIN: Water on Earth 97.5% of Earth s water is salt water 2.5% of Earth s water is fresh water 98.7% of fresh water is frozen/ underground 1.3% of fresh water is surface water Less than 1% of Earth s water is usable for humans.
EXPLORE: Water and Landforms Lakes Permafrost/Tundra Ocean Wetlands Desert Rainforest Ice/Glaciers
EXPLORE: Water on Earth with NatGeo
EVALUATE Why is Earth s nickname the water planet both accurate and misleading? List at least 5 things you learned
Exploring the Water Cycle Lesson Created by the GPM Education and Public Outreach Team NASA Goddard Space Flight Center
Engage Think-Pair Share: What is precipitation?
Engage The Water Cycle http://pmm.nasa.gov/video-gallery/what-is-global-precipitationmeasurement
Think-Pair-Share Based upon what we just viewed, why is it important to study and understand the water cycle?
GPM The Global Precipitation Measurement (GPM) Satellite will collect precipitation data from around the world. Knowing where and how much rain or snow falls globally is vital to understanding how weather and climate impact both our environment and Earth s water and energy cycles. Precipitation patterns have effects on agriculture, fresh water availability, and responses to natural disasters.
Explore Animation As you watch, think about what is happening in each stage of the water cycle. http://www.youtube.com/watch?v=iohkd5fwzoe
Explain: Energy from Sun Stages that require solar radiation. (Heat) Condensation Precipitation Runoff Transpiration Evaporation Solar Radiation Infiltration Groundwater Flow
Explain: Condensation Stages that require water to give off heat. (Cool down) Condensation Precipitation Runoff Transpiration Evaporation Solar Radiation Infiltration Groundwater Flow
Explain: Gravity Which parts of the water cycle are driven by the force of gravity? Condensation Precipitation Runoff Transpiration Evaporation Solar Radiation Infiltration Groundwater Flow
Explain Watch each of the following demonstrations so you can answer the questions that go with them on your capture sheet.
Evaporation: (1:08) http://www.youtube.com/watch?v=zsb4zeqlfxq Transpiration: (5:15) http://www.youtube.com/watch?v=jxjw5veb5rk Condensation: http://www.youtube.com/watch?v=bymt5acv-c4 Infiltration: http://www.youtube.com/watch?v=vmo0fravgkm Freshwater from Saltwater: http://www.youtube.com/watch?v=mhhrqkxwxeo
Water, Water Everywhere http://pmm.nasa.gov/education/videos/water-water-everywhere