1 Patricia is studying ways to deal with water pollution. She knows that proper sanitation is important. What is one way to deal with the negative effects of water pollution? A Dumping waste directly into water bodies B Treating wastewater before release C Using more fertilizers in agriculture D Decreasing water treatment
2 Which indicator shows the acidity or alkalinity of water? A Turbidity B pH C Hardness D Temperature
3 Emma is learning about water treatment processes. She knows that coagulation helps to remove suspended particles. What is added to water to help particles clump together during coagulation? A Chlorine B Alum C Fluoride D Ozone
4 Which practice helps prevent water-borne diseases? A Using polluted water B Drinking untreated water C Boiling drinking water D Storing water openly
6 Excessive chloride in water indicates: A Fresh water B Sewage contamination C Pure water D Distilled water
7 Water is called a universal solvent because it: A Dissolves all substances B Dissolves most ionic and polar substances C Dissolves only gases D Dissolves only solids
9 Chloe is studying the disadvantages of wastewater. She knows that wastewater contains harmful substances. Which of the following is a component of wastewater? A Pure water B Organic matter and pathogens C Distilled water D Oxygen only
10 Julia is learning about phosphates in water. She knows that phosphates from fertilizers and detergents can enter water bodies. What is a disadvantage of phosphates in water? A They increase oxygen levels B They cause excessive algae growth (eutrophication) C They kill all harmful bacteria D They make water crystal clear
11 Water pollution can be reduced by: A Dumping waste in rivers B Treating sewage before disposal C Using more pesticides D Deforestation
12 Zara is studying waterborne diseases. She knows that hepatitis is a waterborne disease. How is hepatitis primarily transmitted? A Through air B Through contaminated food and water C Through insect bites D Through skin contact
13 Which method is used to kill harmful microorganisms in water? A Filtration B Chlorination C Sedimentation D Aeration
14 Uma is studying the properties of water. She knows that water has a high surface tension. Which of the following is a result of high surface tension? A Water dissolving salts easily B Water droplets forming spherical shapes C Water boiling at 100°C D Water freezing at 0°C
15 Oliver is learning about waterborne diseases. He knows that typhoid is a waterborne disease. Which of the following is also a waterborne disease? A Malaria B Jaundice C Tuberculosis D Asthma
16 Quinn is studying ways to deal with water pollution. He knows that planting trees can help. How does planting trees help in reducing water pollution? A By increasing runoff B By reducing soil erosion and runoff of pollutants C By decreasing water availability D By increasing fertilizer use
17 Which of the following is a chemical water pollutant? A Plastic waste B Oil spills C Bacteria D Algae
18 Julia is studying waterborne diseases. She knows that dysentery is a waterborne disease. What is a symptom of dysentery? A Skin rash B Severe diarrhea with blood C Cough D Headache
19 Waseem is studying water scarcity in Pakistan. He knows that population growth is a contributing factor. How does population growth lead to water scarcity? A By reducing the need for water B By increasing water demand and reducing per capita availability C By increasing rainfall D By purifying water
20 Khalid is studying the properties of water. He knows that water has a high specific heat capacity. What is the significance of high specific heat capacity? A Water heats up quickly B Water cools down quickly C Water resists temperature changes, helping to regulate climate D Water evaporates easily
21 Waseem is studying the disadvantages of natural substances found in water. He knows that some substances can be harmful. Which of the following is a harmful substance that can be found in water? A Calcium B Magnesium C Lead D Bicarbonate
23 Xia is studying the benefits of natural substances in water. She knows that some minerals are essential for health. Which mineral is essential for human health and often found in water? A Lead B Mercury C Magnesium D Arsenic
24 Lara is studying the quality of water from natural resources. She knows that surface water is more prone to pollution. Which of the following is a source of surface water pollution? A Groundwater recharge B Agricultural runoff C Volcanic activity D Glacial melt
26 Oliver is studying water pollution. He knows that household wastes can pollute water. Which of the following is a household waste that can pollute water? A Recyclable paper B Cooking oil and fats C Cardboard boxes D Glass bottles
27 Fatima is studying water pollution from agriculture. She knows that fertilizers can run off into water bodies. What is a way to prevent fertilizer runoff? A Applying fertilizers before heavy rain B Using buffer strips near water bodies C Using more fertilizers D Burning crop residues
28 George is learning about water pollution. He knows that plastics are a major pollutant in water bodies. What is a disadvantage of plastics in water? A They provide habitat for aquatic life B They degrade naturally and are harmless C They are non-biodegradable and harm marine life D They increase oxygen levels in water
30 Lara is learning about chlorination of water. She knows that chlorine is added to kill harmful microorganisms. What is the purpose of chlorination? A To add taste to water B To disinfect water and kill pathogens C To remove all minerals D To increase the pH of water