January 15, 2014 Agenda 1.Roll 2.PowerPoint: Using Water Wisely 3.Possible Video

Subject Area: Using Water Wisely EQ: 6. Why is water considered a natural resource that we need to preserve? Questions: 1.What are the stages of treatment for water at a sewage treatment plant? 2.What is the difference between a septic system and a sewage treatment plant? 3.How can ground water be both a renewable and non-renewable resource?

Using Water Wisely There is a limited supply of fresh water on the Earth. Only 3% of the water on Earth is drinkable and 75% of that 3% is frozen in the polar icecaps. It is important that we use our water resources wisely.

Water Pollution Surface water, such as rivers and lakes, and ground water are often polluted by waste from cities, factories, and farms.

Point-Source Pollution One type of pollution is called point-source pollution because it comes from one particular point. An example of this could be a sewer pipe or a factory drain. The law prohibits much of this type of pollution.

Nonpoint-Source Pollution Nonpoint-source pollution is very difficult to control because it does not come from a single source. This will contaminate rivers and lakes by runoff. Examples of this come from street gutters, fertilizers, and drainage from mines. Partner Question: What is the difference between point-source pollution and nonpoint-source pollution? The difference is …

Ground Water is a Source of Fresh Water More than half of all household water in the United States comes from ground water. Ground water can become polluted from surface water and is very difficult and expensive to clean up.

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Renewing Polluted Water Where does the water go when you flush the toilet or run water down a shower drain? If you live in a city the water will go to a sewage treatment plant. In other areas it might go into a septic tank.

Sewage Treatment Plant Sewage treatment plants are factories that clean the waste materials out of water that comes from the sewer or drains. These plants protect the environment from water pollution and us from disease.

Cleaning Up Water When water reaches a sewage treatment plant, it is cleaned in two different ways. There is a primary treatment and a secondary treatment. >>>

Primary Treatment In primary treatment dirty water is passed through a large screen to catch large solid objects, like paper, rags, and bottle caps. Then it is placed in a tank where the heavier particles sink to the bottom and oils and scum are skimmed off the top.

Secondary Treatment In the secondary treatment the water is sent to an aeration tank where it is mixed with oxygen and bacteria. The bacteria feeds on the waste and uses the oxygen. Then chlorine is added and the water is released into a water source, like the ocean, a lake, or stream. Partner Question: What is the process of water treatment in a sewage treatment plant? The process is …

Septic Tank A septic tank is a large underground tank that collects and cleans waste water from a household.

Where the Water Goes

Water in Industry Water is used to cool power stations, to clean industrial products, to extract minerals, and to create power for factories.

Renewable Resource Renewable resource is one that can be replenished. Water is generally considered a renewable resource.

Nonrenewable Resource Nonrenewable resource is a substance that cannot be replaced once it is used. Water can sometimes be a nonrenewable resource if it takes a long time to replenish the aquifers once they are empty. Partner Question: What is the difference between a renewable and a nonrenewable resources? The difference is …

Water in Agriculture Water from the aquifers are used for farming. Some of the Aquifers are so low that it would take 1000 years to replenish the water.

Water Regulation In some communities it is necessary to regulate the water usage because the supply may become very low and we need water to live. >>>

Summary 1.Answer the essential question “Why is water considered a natural resource that we need to preserve?” 2.Your answer needs to be in complete sentences. 3.Place your answer at the bottom of the notes we did today. 4.Make sure you include why water is a renewable and nonrenewable resource. 5.Use your notes to get the answers.

Video Questions for “Water: A Precious Resource” 1.What did you know? _____________________________________________ 2. What did you learn? _____________________________________________ 3. What do you want to know? _____________________________________________

Video Questions for “Water Pollution” 1.What did you know? _____________________________________________ 2. What did you learn? _____________________________________________ 3. What do you want to know? _____________________________________________

Homework Chapter 10, Section 4 in the purple workbook. This is found on pages 78 – 80.