Teaching your class 7 students about wastewater stories and environmental awareness has never been easier. With our interactive worksheets, teachers can engage their students in a fun and meaningful way. From facts about water conservation to exciting activities, this worksheet is the perfect way to help your students become more knowledgeable and aware of the world around them.

Introduction to Waste Water and its Impact on the Environment.

It's important to teach students the impact that wastewater has on our environment. From water pollution to sewage overflows, learning about the consequences of improper waste management can help them understand the importance of being vigilant in conserving our natural resources. This worksheet provides a comprehensive overview of wastewater production and its effects on the environment, as well as ways to avoid environmental hazards through responsible practices.

Exploring the Technology Used to Treat Wastewater.

Technology plays an important role in wastewater treatment, allowing us to process and cleanse wastewater so that it can be safely returned to its source. With this worksheet, students will explore several technologies used in wastewater treatment, including activated sludge treatment, membrane bioreactors, anaerobic digestion and more. They will also learn important terms related to these treatments and how they work together to effectively purify water for reuse or safe release into the environment.

Analyzing Different Types of Pollution in Our Waters. 

Pollution from a variety of sources can enter our water systems, including industrial waste, agricultural nutrient runoff, and domestic sewage. Students will use this worksheet to analyze wastewater stories and distinguish between the different types of pollution. They will explore how these pollutants can impact local ecosystems and discuss ways we all can help reduce our impact on the environment.

If you are a class 7 student studying wastewater and sewage treatment, you will be familiar with terms such as wastewater, sewerage, and sludge. However, it can be challenging to understand the entire process of wastewater treatment and the problems that arise from untreated sewage. That is where the "Wastewater Story" class 7 worksheet comes into play. This worksheet provides comprehensive information about wastewater treatment, including the types of sewage, chemical disinfectants used, and the process of treating sludge. With this worksheet, you can test your knowledge on the subject by answering questions and filling in the blanks.

To fully understand the topic of wastewater treatment, it is essential to understand the concept of sewerage. The worksheet explains what sewerage is and how wastewater from homes and industries is transported to wastewater treatment plants (WTPs) through a network of sewers. The worksheet also covers the different types of sewage, including organic and inorganic impurities, and explains how these impurities are removed through physical, biological, and chemical processes.

The worksheet also includes questions related to the types of chemicals used for disinfection, such as chlorine and ozone, and their role in killing bacteria and viruses in wastewater. It also highlights the importance of sludge, the semi-solid residue generated during the wastewater treatment process. The worksheet explains the different methods used to treat sludge, such as digestion and dewatering. It also highlights the various uses of sludge, such as fertilizer for agriculture.

Overall, the "Wastewater Story" class 7 worksheet is an essential tool for students to understand the importance of wastewater treatment and the consequences of untreated sewage. By answering questions and filling in the blanks, students can reinforce their understanding of the subject and prepare for examinations. Additionally, the worksheet is available in PDF format, making it accessible for students to download and use at their convenience.

Wastewater Story class 7 questions and answers

1. What is wastewater? Answer: Wastewater is the water that is contaminated by various substances, including human and animal waste, chemicals, and other pollutants.

   
   

2. What is the difference between sewage and wastewater? Answer: Sewage is a type of wastewater that specifically refers to the water that is contaminated by human and animal waste. Wastewater, on the other hand, can refer to any type of water that is contaminated by any substance.

   
   

3. What is a wastewater treatment plant? Answer: A wastewater treatment plant is a facility that is designed to treat wastewater so that it can be safely released back into the environment.

   
   

4. What is sludge? Answer: Sludge is a semi-solid substance that is produced during the wastewater treatment process. It is made up of the solid materials that are removed from the wastewater, such as human and animal waste, as well as other organic and inorganic matter.

   
   

5. How is sludge treated? Answer: Sludge is typically treated through a process called digestion, which involves the use of bacteria to break down the organic matter in the sludge. The remaining material is then treated and disposed of in a safe manner.

   
   

6. Name two chemicals used to disinfect water. Answer: Two common chemicals used to disinfect water are chlorine and ozone.

   
   

7. What is sewerage? Answer: Sewerage refers to the system of pipes, pumps, and other infrastructure that is used to collect and transport wastewater and sewage from homes and businesses to a wastewater treatment plant.

   
   

8. What are two organic impurities present in sewage? Answer: Two common organic impurities present in sewage are faecal matter and food waste.

   
   

9. What is the process of removing solid waste from wastewater called? Answer: The process of removing solid waste from wastewater is called sedimentation.

   
   

10. What is the full form of WTP? Answer: The full form of WTP is Wastewater Treatment Plant.

    
    

    FAQs

    
    

    Q: What is the Wastewater Story in Class 7? A: "Wastewater Story" is a chapter in Class 7 Science that deals with the treatment of wastewater. It discusses the sources of wastewater, the various stages of wastewater treatment, and the importance of treating wastewater before releasing it into the environment.

    Q: What is wastewater? A: Wastewater is the water that is used in households, industries, and other establishments and then released into the environment as sewage.

    Q: Why is it important to treat wastewater? A: It is important to treat wastewater because it contains harmful contaminants that can harm the environment and human health. Untreated wastewater can pollute the water bodies and lead to the spread of diseases.

    Q: What are the stages of wastewater treatment? A: The stages of wastewater treatment are as follows:

    1. Preliminary Treatment
    2. Primary Treatment
    3. Secondary Treatment
    4. Tertiary Treatment
    5. Disinfection

    Q: What is sludge? A: Sludge is the semi-solid material that is produced during the wastewater treatment process. It contains both organic and inorganic matter and is removed from the wastewater before it is released into the environment.

    Q: How is sludge treated? A: Sludge is treated using various methods, including digestion, dewatering, and drying. These processes help in reducing the volume of sludge and converting it into a more stable and less odorous form.

    Q: What is a Wastewater Treatment Plant (WTP)? A: A Wastewater Treatment Plant (WTP) is a facility that is designed to treat wastewater from households, industries, and other establishments. It uses various physical, chemical, and biological processes to remove harmful contaminants from the wastewater and make it safe for release into the environment.

    Q: What is sewerage? A: Sewerage is the system of pipes, pumps, and other equipment that is used to transport wastewater from households, industries, and other establishments to the Wastewater Treatment Plant (WTP).

    Q: What are the two organic impurities present in sewage? A: The two organic impurities present in sewage are proteins and carbohydrates.

    Q: Name two chemicals used to disinfect water. A: The two chemicals used to disinfect water are chlorine and ozone.