Water A Precious Resource MCQs
Water: A Precious Resource – MCQs
Class: 7 |
Subject: Science |
Section: 15 – Natural Resources |
Topic: Water: A Precious Resource
CBSE Board Examination – NCERT Concept Based Objective Questions
1. Only a small percentage of Earth’s water is available as fresh water. It is about:
Answer: C. 3%
Nearly 97% of Earth’s water is salty ocean water. Only about 3% is fresh water, and much of it is locked in glaciers, making usable water very limited.
Nearly 97% of Earth’s water is salty ocean water. Only about 3% is fresh water, and much of it is locked in glaciers, making usable water very limited.
2. The main source of fresh water on Earth is:
Answer: B. Rain
Rain replenishes rivers, lakes, ponds, and groundwater through the water cycle.
Rain replenishes rivers, lakes, ponds, and groundwater through the water cycle.
3. The process of seeping of water into the ground is called:
Answer: C. Infiltration
Infiltration allows rainwater to enter soil and recharge groundwater.
Infiltration allows rainwater to enter soil and recharge groundwater.
4. Groundwater level decreases due to:
Answer: B. Excessive pumping
Overuse of borewells and tube wells lowers the water table.
Overuse of borewells and tube wells lowers the water table.
5. Water stored underground is called:
Answer: B. Groundwater
It fills spaces between soil and rocks forming aquifers.
It fills spaces between soil and rocks forming aquifers.
6. Water table means:
Answer: B
The water table is the top level where soil and rocks are saturated with water.
The water table is the top level where soil and rocks are saturated with water.
7. Which method helps conserve groundwater?
Answer: B
Rainwater harvesting stores rain for future use and recharges aquifers.
Rainwater harvesting stores rain for future use and recharges aquifers.
8. Drip irrigation saves water because it:
Answer: C
It delivers water directly to plant roots, reducing wastage.
It delivers water directly to plant roots, reducing wastage.
9. The largest use of water in India is for:
Answer: B
Agriculture consumes maximum freshwater for irrigation.
Agriculture consumes maximum freshwater for irrigation.
10. Which practice leads to water scarcity?
Answer: C
Overexploitation reduces available freshwater resources.
Overexploitation reduces available freshwater resources.
11. Rooftop rainwater harvesting collects water from:
Answer: B
Rain falling on roofs is stored or directed underground.
Rain falling on roofs is stored or directed underground.
12. Water scarcity occurs when:
Answer: B
Shortage happens when consumption is higher than availability.
Shortage happens when consumption is higher than availability.
13. Which state practice helps recharge groundwater?
Answer: C
Roots improve infiltration and water retention.
Roots improve infiltration and water retention.
14. Aquifers are:
Answer: B
Aquifers store groundwater between rock layers.
Aquifers store groundwater between rock layers.
15. Which is NOT a source of freshwater?
Answer: C
Ocean water is saline and unsuitable without treatment.
Ocean water is saline and unsuitable without treatment.
16. The continuous circulation of water is called:
Answer: B
It includes evaporation, condensation, and precipitation.
It includes evaporation, condensation, and precipitation.
17. Which human activity wastes maximum water?
Answer: B
Continuous leakage leads to major wastage over time.
Continuous leakage leads to major wastage over time.
18. Desalination means:
Answer: B
It converts seawater into freshwater.
It converts seawater into freshwater.
19. Water conservation is important because:
Answer: B
Usable freshwater is limited and must be preserved.
Usable freshwater is limited and must be preserved.
20. Best way to save water at home:
Answer: B
Using buckets instead of showers reduces consumption.
Using buckets instead of showers reduces consumption.