Class 7 Exam  >  Class 7 Notes  >  Class 7 Oxford Science: Chapter Notes, Worksheets & Tests  >  Worksheets: Wastewater Management

Wastewater Management Class 7 Worksheet Science

Section A: Multiple Choice Questions


Q.1. Which of the following is not a source of wastewater?
(a) Domestic activities
(b) Industrial activities
(c) Agricultural activities
(d) All of the above

Q.2. What is sewage?
(a) Clean water
(b) Wastewater from domestic activities
(c) Wastewater from industrial activities
(d) None of the above

Q.3. Which of the following is a contaminant found in wastewater?
(a) Metals
(b) Pesticides
(c) Microorganisms
(d) All of the above

Q.4. What is eutrophication?
(a) The process of treating wastewater
(b) The process of adding nutrients to a body of water
(c) The process of removing nutrients from a body of water
(d) None of the above

Q.5. What is the primary purpose of a wastewater treatment plant?
(a) To produce clean water for drinking
(b) To remove contaminants from wastewater
(c) To recycle wastewater for industrial use
(d) None of the above

Section B: Short Questions


Q.1. What are the different sources of wastewater?
Q.2. What are the contaminants found in wastewater?
Q.3. Explain the concept of eutrophication.
Q.4. What is the purpose of a wastewater treatment plant?
Q.5. How can sewage generation be controlled?

Section C: Fill in the blanks


Q.1. __________ is the main source of wastewater in households.
Q.2. The sewage contains __________ that can harm the environment.
Q.3. The process of adding nutrients to a water body and causing excessive plant growth is called __________.
Q.4. The __________ is responsible for collecting and transporting wastewater.
Q.5. The process of removing large particles from wastewater is called __________.

Section D: Match the column 


Match the items in Column A with those in Column B.Wastewater Management Class 7 Worksheet Science

Section E: True or False 


Q.1. Wastewater is mainly generated in industries. 
Q.2. The sewer system collects rainwater along with wastewater. 
Q.3. Tertiary treatment is the final stage of wastewater treatment. 
Q.4. Alternative methods of sewage disposal are not required in rural areas. 
Q.5. Improper management of sewage can lead to the spread of diseases. 

You can access the solutions to this worksheet here.

The document Wastewater Management Class 7 Worksheet Science is a part of the Class 7 Course Class 7 Oxford Science: Chapter Notes, Worksheets & Tests.
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FAQs on Wastewater Management Class 7 Worksheet Science

1. What is wastewater management and why is it important?
Ans. Wastewater management refers to the processes involved in treating and disposing of wastewater generated from domestic, industrial, and agricultural sources. It is important because it helps prevent pollution, protects public health, and conserves water resources by treating wastewater so it can be reused or safely released into the environment.
2. What are the main stages involved in the wastewater treatment process?
Ans. The main stages in the wastewater treatment process include preliminary treatment (removal of large solids), primary treatment (sedimentation of solids), secondary treatment (biological treatment to remove dissolved organic matter), and tertiary treatment (advanced processes to remove nutrients and pathogens).
3. How does untreated wastewater affect the environment?
Ans. Untreated wastewater can lead to serious environmental issues, such as water pollution, harm to aquatic life, and contamination of drinking water sources. It can also contribute to the spread of diseases and disrupt ecosystems.
4. What are some common methods used for treating wastewater?
Ans. Common methods for treating wastewater include filtration, biological treatment (using bacteria to break down organic matter), chemical treatment (using chemicals to remove contaminants), and advanced methods like membrane filtration and reverse osmosis.
5. How can individuals contribute to better wastewater management in their communities?
Ans. Individuals can contribute by reducing water consumption, avoiding the disposal of harmful substances down the drain (like chemicals and oils), participating in local clean-up efforts, and educating others about the importance of proper wastewater management.
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