Wastewater Story
Science · Grade 7 · Week 18 · 25 questions
Mixtures and solutions are everywhere — from the air you breathe to the drinks you enjoy. Understanding how substances combine and how to separate them is fundamental to chemistry.
What you'll practise
- Distinguish between mixtures and pure substances
- Identify methods for separating mixtures
- Understand dissolving and solubility
- Apply separation techniques in practical contexts
All 25 questions in this Wastewater Story quiz
Grade 7 Science — Wastewater Story: 25 practice questions with instant scoring and explanations.
- Sewage is:
- A sewage treatment plant processes wastewater through:
- The solid waste removed during sewage treatment is called:
- Biogas is produced during sewage treatment from:
- The main use of biogas produced from sewage treatment is:
- What is the proper method to dispose of sewage?
- Open drains are dangerous because they:
- Good sanitation practices include:
- Vermicomposting is a method to:
- Which of these is NOT a component of household wastewater?
- The first stage of sewage treatment involves:
- The liquid wastewater left after treatment is called:
- Chlorination in wastewater treatment is done to:
- Septic tanks are used in areas where:
- Which organisms are used in biological treatment of sewage?
- The pH level of treated wastewater should be:
- Treated wastewater can be used for:
- What happens if sewage is directly discharged into rivers?
- The main advantage of using earthworms in vermicomposting is:
- Industrial wastewater is different from municipal sewage because:
- The sludge from treatment plants can be:
- Eutrophication in water bodies is caused by:
- A constructed wetland for wastewater treatment works by:
- Which is a sign of poor sanitation in a community?
- The aeration tank in a treatment plant is used for:
Question 1 of 250 correct so far