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Planet H2O- Water Supply and Demand

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MSC_PlanetH2OWaterSupplyandDemand.flv
MSC_PlanetH2OWaterSupplyandDemand_x264.mp4

This podcast is part of the series: Planet H2O

Creator:

McWane Science Center


School/Organization:

McWane Science Center

Overview:

In this lesson, the students are instructed to imagine that they are in control of a small country. They are shown a pitcher that contains their country’s water supply. They are then asked to make decisions on where the water should go. The students are given small containers that represent their needs and demands for water. Water is distributed from the supply pitcher for each one of their demands.

About 2/3 of our water supplies goes to agriculture and food production. Two-thirds (2/3) of the water from the supply pitcher is poured into the “agriculture” container. Students then list other demands...drinking water, water for cleaning, etc. Students are then presented with other factors that will influence their supply and demand. An environmental factor, such as a drought, will mean that the affected part of the country will have an increased demand (water is distributed from the supply pitcher). A great increase in the human population in another part of the country will increase their demand as well (water is distributed from the supply pitcher). When the supply pitcher is almost empty, the topic of water scarcity arises. Water scarcity occurs when the demand for water out paces the supply and causes water shortages.


Length: 02:48

Content Areas: Science

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

SC (5)
9. Describe the relationship of populations within a habitat to various communities and ecosystems.
  • Describing the relationship between food chains and food webs
  • Describing symbiotic relationships
  •  
    SC (9-12) Environmental Elective
    1. Identify the influence of human population, technology, and cultural and industrial changes on the environment.
  • Describing the relationship between carrying capacity and population size
  •  
    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 (5)
    15. Identify the distribution of freshwater and salt water on Earth (e.g., oceans, lakes, rivers, glaciers, ground water, polar ice caps) and construct a graphical representation depicting the amounts and percentages found in different reservoirs.
     
    SC2015 (9-12) Biology
    7. Develop and use models to illustrate examples of ecological hierarchy levels, including biosphere, biome, ecosystem, community, population, and organism.
     
    SC2015 (9-12) Biology
    9. Use mathematical comparisons and visual representations to support or refute explanations of factors that affect population growth (e.g., exponential, linear, logistic).
     
    SC2015 (9-12) Biology
    10. Construct an explanation and design a real-world solution to address changing conditions and ecological succession caused by density-dependent and/or density-independent factors.*
     
    SC2015 (9-12) Environmental Science
    3. Use mathematics and graphic models to compare factors affecting biodiversity and populations in ecosystems.
     
    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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