1
Ming is comparing distilled water and tap water. He knows that distilled water is pure water. Which of the following is true about distilled water?
2
Victor is studying the quality of water from natural resources. He knows that groundwater is often cleaner than surface water. What is a disadvantage of groundwater?
3
Rachel is studying waterborne diseases. She knows that jaundice is a waterborne disease. What is the cause of jaundice?
4
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?
5
David is studying the treatment of domestic water. He knows that raw water treatment involves several steps. What is the first step in the treatment of raw water?
6
Chloe is studying water pollution. She learns that metal compounds can be harmful if present in water. Which of the following is a disadvantage of metal compounds in water?
7
Which household method improves drinking water quality?
8
Water pollution can be reduced by:
9
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?
10
Which method is used to kill harmful microorganisms in water?
11
Which of the following is a chemical water pollutant?
12
Uma is studying water treatment. She knows that coagulation involves the addition of chemicals. What is the purpose of adding alum in coagulation?
13
Which activity increases water pollution?
14
Which metal is commonly found as a toxic water pollutant?
15
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?
16
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?
17
Hardness of water is mainly due to the presence of:
18
Patricia is studying water scarcity in Pakistan. She knows that inadequate water supply is a problem. What is a cause of inadequate water supply?
19
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?
20
Which method is used to remove permanent hardness?
21
Oliver is learning about waterborne diseases. He knows that typhoid is a waterborne disease. Which of the following is also a waterborne disease?
22
Which parameter indicates the amount of salts dissolved in water?
23
Which process uses resin to soften water?
24
Ahmed is studying the properties of water. He knows that water is a polar molecule and can dissolve many substances. What property of water makes it a good solvent?
25
David is studying water treatment. He knows that raw water treatment involves multiple steps. What is the correct order of steps in raw water treatment?