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Planet H2O- Where's the Water?

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MSC_PlanetH2OWherestheWater.flv
MSC_PlanetH2OWherestheWater_x264.mp4

This podcast is part of the series: Planet H2O

Creator:

McWane Science Center


School/Organization:

McWane Science Center

Overview:

Seventy percent (70%) of the Earth’s surface is covered with water and when viewed from space, our planet appears blue with a plentiful supply of water. However, clean, fresh water for drinking and irrigation is a scarce and valuable commodity in many parts of the world. Even though water is abundant on our planet, only a very small percentage can be used by humans and other organisms.

This activity demonstrates the sources of water on our planet. Reduce Earth’s water supply to 2 liters and then use common household items to represent the distribution of water on our planet. More than half a gallon is found in the oceans, inland seas, and salt lakes – water that is too salty to use. At the end of the activity, you will see that only about 1 teaspoon of our original 2 liters is readily available for human use – water that is found in rivers, lakes, streams, and underground aquifers.


Length: 04:06

Content Areas: Science

Alabama Course of Study Alignments and/or Professional Development Standard Alignments:

SC (9-12) Environmental Elective
5. Describe properties of water that make it a universal solvent.
 
SC (9-12) Environmental Elective
6. Identify sources of local drinking water.
  • Determining the quality of fresh water using chemical testing and bioassessment
  • Describing the use of chemicals and microorganisms in water treatment
  • Describing water conservation methods
  • Describing the process of underground water accumulation, including the formation of aquifers
  • Identifying major residential, industrial, and agricultural water consumers
  • Identifying principal uses of water
  •  
    SC (9-12) Environmental Elective
    7. Identify reasons coastal waters serve as an important resource.
    Examples: economic stability, biodiversity, recreation
  • Classifying biota of estuaries, marshes, tidal pools, wetlands, beaches, and inlets
  • Comparing components of marine water to components of inland bodies of water
  •  
    SC2015 (9-12) Biology
    5. Plan and carry out investigations to explain feedback mechanisms (e.g., sweating and shivering) and cellular processes (e.g., active and passive transport) that maintain homeostasis.
    a. Plan and carry out investigations to explain how the unique properties of water (e.g., polarity, cohesion, adhesion) are vital to maintaining homeostasis in organisms.
     
    SC2015 (9-12) Earth and Space Science
    13. Analyze and interpret data of interactions between the hydrologic and rock cycles to explain the mechanical impacts (e.g., stream transportation and deposition, erosion, frost-wedging) and chemical impacts (e.g., oxidation, hydrolysis, carbonation) of Earth materials by water's properties.
     
    SC2015 (9-12) Earth and Space Science
    14. Construct explanations from evidence to describe how changes in the flow of energy through Earth's systems (e.g., volcanic eruptions, solar output, ocean circulation, surface temperatures, precipitation patterns, glacial ice volumes, sea levels, Coriolis effect) impact the climate.
     
    SC2015 (9-12) Environmental Science
    9. Develop and use models to trace the flow of water, nitrogen, and phosphorus through the hydrosphere, atmosphere, geosphere, and biosphere.
     
    SC2015 (9-12) Environmental Science
    10. Design solutions for protection of natural water resources (e.g., bioassessment, methods of water treatment and conservation) considering properties, uses, and pollutants (e.g., eutrophication, industrial effluents, agricultural runoffs, point and nonpoint pollution resources).*
     
    SC2015 (9-12) Environmental Science
    11. Engage in argument from evidence to defend how coastal, marine, and freshwater sources (e.g., estuaries, marshes, tidal pools, wetlands, beaches, inlets, rivers, lakes, oceans, coral reefs) support biodiversity, economic stability, and human recreation.
     

     


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