Here are 10 One-Word Answer Type Questions from the subtopic “Water, Our Lifeline” of the chapter Wastewater Story with their answers and explanations (as you requested, explanation immediately after each question and answer):
1)
Question: What is the most essential liquid needed for life?
Answer: Water
Explanation: Water is the basic necessity of life. All living beings need water for drinking, growing food, cleaning, and other daily activities.
2)
Question: What is the term used for water that is safe and clean to drink?
Answer: Potable
Explanation: Potable water is water that is free from impurities and germs, making it fit for human consumption.
3)
Question: What percentage of Earth’s surface is covered with water?
Answer: Seventy
Explanation: About 70% of the Earth’s surface is covered with water, but only a small fraction of it is fresh and usable for drinking and daily use.
4)
Question: What is the main source of fresh water on Earth?
Answer: Rain
Explanation: Rain is the primary source of fresh water. It replenishes rivers, lakes, and groundwater, which are the main sources of drinking water.
5)
Question: What is the day celebrated worldwide to spread awareness about water conservation?
Answer: World Water Day
Explanation: World Water Day is celebrated on 22nd March every year to make people aware about the importance of saving water and using it wisely.
6)
Question: What is the term used for the process of removing impurities from wastewater?
Answer: Treatment
Explanation: Treatment is the process of cleaning wastewater by removing pollutants before it is released back into water bodies or reused.
7)
Question: Which disease is caused due to drinking contaminated water?
Answer: Cholera
Explanation: Cholera is a water-borne disease caused by drinking water contaminated with bacteria. It leads to severe diarrhoea and dehydration.
8)
Question: What was the name of the campaign started by the United Nations for water awareness?
Answer: Water for Life
Explanation: The United Nations declared 2005-2015 as the International Decade for Action: Water for Life to reduce the number of people without access to safe drinking water.
9)
Question: Which essential gas is dissolved in water and required by aquatic animals?
Answer: Oxygen
Explanation: Oxygen is dissolved in water and is essential for the survival of aquatic animals like fish, frogs, and other water organisms.
10)
Question: What is the process by which plants release water vapor into the air?
Answer: Transpiration
Explanation: Transpiration is the process in which plants absorb water from the soil and release water vapor into the atmosphere, playing an important role in the water cycle.
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