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Water Supply and Demand

Video 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. >
Extension Activities

About 2/3 of our water supplies go 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 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.

Alabama Course of Study

Science: 3rd – 13; 5th -9

Environmental Studies: 9-12th – 1,5,6,7

Geography: 7th – 3,8,9,11,12

Biology: 9-12th - 16

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Study Guide

More Episodes OF Planet H20

IQ Leaning Network

Video Library

Education Sponsors

IQ Learning Network
  • Alpha Foundation
  • Daniel Foundation of Alabama
  • Hugh Kaul Foundation
  • Monte L. Moorer Foundation
  • Sybil H. Smith Charitable Trust
Web-Interactive Field Trips
  • Alabama Humanities Foundation
    A state program of the National Endowment for the Humanities
  • Robert Meyer Foundation
  • The Stephens Foundation
  • Wells Fargo Foundation
e-Learning for Educators/ APT Learn Online
  • Community Foundation of Greater Birmingham
  • U.S. Department of Education
STEM Education Initiative
  • Ann & Alfred F. Delchamps, Jr. Charitable Fund
  • BBVA Compass Bank
  • Beverly and Gary Cooper Charitable Fund
  • Community Foundation of South Alabama
  • Corporation for Public Broadcasting
General Educational Support
  • Alabama Department of Human Resources
  • Blue Cross/Blue Shield of Alabama
  • Books-A-Million
  • Honda Manufacturing of Alabama
  • Publix
  • Wells Fargo
PBS Kids Programs
  • Alabama Power
  • Books-A-Million
  • Children's of Alabama
  • Publix
  • US Space & Rocket Center
American Graduate
  • Corporation for Public Broadcasting
Southern Education Desk
  • Corporation for Public Broadcasting