MCQ questions for class 7 Science Chapter 16 Water: A Precious Resource
Question 1: What percentage of the Earth's surface is covered by water?
50%
70%
90%
30%
Question 2: Which of the following is the largest source of fresh water on Earth?
Rivers
Lakes
Glaciers
Groundwater
Question 3: What is the term for the process by which water from the surface of the Earth is heated by the sun and then rises into the atmosphere?
Condensation
Precipitation
Evaporation
Transpiration
Question 4: Which of the following is the main source of water vapor in the atmosphere?
Rivers
Oceans
Lakes
Ponds
Question 5: What is the term for the process by which water vapor in the atmosphere turns into liquid water droplets?
Condensation
Precipitation
Evaporation
Transpiration
Question 6: Which of the following is a form of precipitation?
Evaporation
Condensation
Dew
Fog
Question 7: What is the term for the downward movement of water from the atmosphere to the Earth’s surface?
Condensation
Precipitation
Evaporation
Transpiration
Question 8: Which of the following is an example of a natural source of water pollution?
Industrial discharge
Sewage discharge
Oil spills
Eutrophication
Question 9: What is the term for the process by which plants release water vapor into the atmosphere?
Condensation
Precipitation
Evaporation
Transpiration
Question 10: Which of the following is a human-made source of water pollution?
Rainwater
Industrial discharge
Natural springs
Melting snow
Question 11: What is the term for the underground layer of water-bearing permeable rock from which groundwater can be extracted?
Aquifer
Water table
Reservoir
Watershed
Question 12: Which of the following is an example of a non-renewable source of water?
Rainwater
Groundwater
Rivers
Oceans
Question 13: What is the term for the level below which the ground is saturated with water?
Aquifer
Water table
Reservoir
Watershed
Question 14: Which of the following is a method of water conservation at the individual level?
Leaving taps open
Harvesting rainwater
Wasting water
Using water without restriction
Question 15: What is the term for the area drained by a single river system or a watershed?
Aquifer
Water table
Reservoir
Watershed
Question 16: Which of the following is a method of water conservation at the community level?
Dumping waste in water bodies
Deforestation
Over-extraction of groundwater
Recharging groundwater
Question 17: What is the term for the process of restoring the natural vegetation cover in an area?
Afforestation
Deforestation
Overgrazing
Desertification
Question 18: Which of the following is a method of water conservation at the national level?
Building dams without planning
Polluting water bodies
Interlinking rivers
Water recycling
Question 19: What is the term for the removal of salts and other impurities from seawater to make it suitable for drinking?
Desalination
Distillation
Filtration
Sedimentation
Question 20: Which of the following is an example of a method to control water pollution?
Dumping industrial waste in rivers
Creating awareness about water conservation
Over-extraction of groundwater
Deforestation
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