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Teaching Guide: What Size Landfill?
produced by : MS. ROSEMARY V. DOUGLAS Web Institute for Teachers, Summer, 2000Menu
Introduction : This is to introduce you to he size of landfill that is use to store solid waste.Click here to return to MenuAim: Our aim is to compute the size of a landfill needed for a city's residential solid waste.Click here to return to MenuRationale :The rational is after World War II, a "throw - away mentality took hold of our country. Americans perceived our land as having an inexhaustible supply of resources and vast spaces in which to dump unwanted waste. Today, each person discards an average of four to five pounds of waste per day. Each year Americans throw away approximately 60 billions cans, 28 billions bottles, four million tons of plastics, 40 million ton of paper, 100 million tires, and three million cars.We all produce trash and we all must take responsibility for it. The U.S. produces about 195 million tons of garbage per year. What happens to all this waste? 67% of it is being disposed of in landfill. A landfill is a carefully designed facility , operated in a planned manner, and established on a site that is highly suitable for containing solid waste materials. It"s estimated that we will have 64 millon tons of waste each year with no place to put it by the end of the decade unless new landfills are built. The purpose of this activity is to help students become aware of the finite space available for landfills and the amount of waste we generate weeklt, monthly, and annually.Click here to return to MenuGoals and Objectives: students will be able to (1) compute the size of landfills required to accommodate ten to fifteen years of use, and (2) estimate the amount of waste generated within varying family situations.Click here to return to MenuAudience: Students in grades 6th - 8thClick here to return to MenuPrerequisites: Students have to have some background of social studies about U.S. , Math (5th grade level), Rdg. (5th grade level), and Some knowledge of Science.Click here to return to MenuSubject-Matter:MATHEMATICSClick here to return to MenuInstructional PlanPROCEDUCEI.GIVE EACH STUDENT A COPY OF THE STUDENT SHEET 'WHAT SIZE LANDFILL?" Discuss with students the information in the background section of the activity. A.) In the first problem, the students will calculate how much land should be set aside for a new city landfill designed to accommodate 10 years of residential waste. B.) 1. weight= (6.5 x 10(4) persons) (2 x 10(3)
lb/ft(3) lb/person/yr) (10 yrs.)
(C) OVER TEN YEARS, THE AREA OF FIFTY - FOOT - DEEP LANDFILL WOULD BE 11 ACRES. CONSIDERING SPACE FOR ROADS AND FENCES, 15 ACRES SHOULD BE ALLOWED. Click here to return to MenuMaterials: STUDENT SHEETS , CALCULATOR, MAP (optional),and computerClick here to return to MenuAssessment and Evaluation:GIVEN WORKSHEET - CHANGES OCCUR AT TIMES OF CRISIS. WHEN YOUR COMMUNITY RUNS AOUT OF SUITABLE LANDFILL SITES, WHAT CHANGES DO YOU THINK WILL TAKE PLACE IN YOUR COMMINITY.Click here to return to MenuAppendices (optional, if needed)
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