If you it answered correctly , I will surely mark you as brainliest ........ Track your own water usage during one week and from that data estimate a community's residential water needs.
Answers
Procedure
Before the Activity
• Gather materials and make copies of the Personal Water Use Chart.
With the Students: Data Collection Instructions
Hand out the chart and explain to students how to use it.
Count the number of times you do each activity in one day, and write that number in the box for that day. Using tallies is the best way to keep track.
Ask an adult in your household whether you have standard or low-flow showerheads and toilets. If you are not sure, assume a standard flow.
For activities that other members in your family might be doing for the household (go through the list to talk about which ones those might be, such as cooking a meal, doing dishes or laundry, etc.), count the number of times anyone in your family does one of those activities in a day, and then divide that total by the number of people in the household to count your portion of that water usage.
If your household has an automatic lawn watering system, find out the schedule so you do not forget to include that water usage.
Also, only count the water that you use at home, and not at school or elsewhere.
How much water do you use every day?
Have students use the chart for one week, reminding them each day to fill it in. You might suggest they hang it on their refrigerator at home.
With the Students: Data Calculation
Mid-week, conduct a preliminary calculation and class discussion, as described in the Assessment section.
At the end of the week, have students fill in the Total Number of Times column by adding across each row to get the total number for each activity.
Have students calculate the water usage for each activity by multiplying the Total Number of Times column by the Estimated Amount of Water Used column.
Have students add together the numbers in the Total Weekly Water Use column to get their Total Weekly Water Use.
Ask each student to write his/her Total Weekly Water Use number on the board.
As a class, take the average of those numbers. Tell the students that they can assume that an average person in Thirsty County uses about that same amount of water in one week.
As a class, divide the average by 7 to get a daily amount of water.
As a class, figure out how much water is needed daily by the entire Thirsty County, which has one million residents, by multiplying the average daily use by 1,000,000.
Conclude with a class discussion. See the post-activity assessment questions provided in the Assessment section.
Assessment
Pre-Activity Assessment
What are uses of water around your house?
Estimation: Have the students look at a gallon container to help them make the following estimations. Encourage them to play with filling the gallon jug with water to help them imagine and estimate. Ask the students: How many gallons of water do you think you use to:
Wash your hands?
Brush your teeth?
Take a shower?
Activity Embedded Assessment
Mid-Week Calculation: After two or three days of data collection, ask students to calculate their total water usage so far. Have them use a separate piece of paper and follow the same steps outlined in the Procedure section. Have all the students write their numbers on the board, and then do the following with the students:
What is the average?
What is the lowest number? Is there a particular reason why it is so low?
What is the highest number? Is there a particular reason why it might be so high?
What might you do to lower your water usage? (Possible answers: Switch to low-flow showerheads/toilets, turn off water while brushing teeth, only run the dishwasher when it is full, use a spray nozzle to stop the hose from running while washing the car, etc.)
Post-Activity Assessment
Graphing: Have students create a pie chart describing what activities make up their total weekly usage of water. Which activities tended to use the most water? The least?
Discussion Questions: Have students answer the following questions by raising their hands.
We counted the water usage in our homes, or for residential buildings. For what other kinds of buildings must engineers include when determining a municipality's estimated total water usage? (Possible answers: Schools, businesses, factories, power plants, farming irrigation, roadside irrigation, storage for drought season, fire protection, swimming pools, recreation/ball field irrigation, etc.)
Say an engineer calculates the average water use for all buildings in a county, and then designs a dam to provide that exact amount of water. Is there always enough water for the residents to use? (Answer: Not necessarily; since the design is based on an average, sometimes the county might use more water than provided. Engineers almost always "over-design" to provide a little extra water, just in case.)
Troubleshooting Tips
Have students double check their calculations. It is easy to make a mistake!