Extra 40 multiple-choice questions (MCQs) with answers for Chapter:14 "Water" of Class 6 Science (CBSE):
What is the chemical formula of water?
a) H₂O₂
b) H₂O
c) O₂
d) CO₂
Answer:
b) H₂O
The process of changing water into water vapor is called:
a) Condensation
b) Evaporation
c) Freezing
d) Precipitation
Answer:
b) Evaporation
Water exists in how many states?
a) One
b) Two
c) Three
d) Four
Answer:
c) Three
The process of changing water vapor into liquid is called:
a) Evaporation
b) Condensation
c) Sublimation
d) Transpiration
Answer:
b) Condensation
Which of the following is a major source of water on Earth?
a) Wells
b) Rivers
c) Oceans
d) Dams
Answer:
c) Oceans
What is the percentage of fresh water available on Earth?
a) 97%
b) 50%
c) 3%
d) 10%
Answer:
c) 3%
The circulation of water between land, ocean, and atmosphere is called:
a) Water Cycle
b) Evaporation
c) Condensation
d) Precipitation
Answer:
a) Water Cycle
Which of the following is an example of surface water?
a) Underground water
b) Rainwater
c) River water
d) Well water
Answer:
c) River water
Which of the following processes increases humidity in the atmosphere?
a) Condensation
b) Evaporation
c) Freezing
d) Melting
Answer:
b) Evaporation
The process by which plants release water vapor into the air is called:
a) Transpiration
b) Condensation
c) Evaporation
d) Infiltration
Answer:
a) Transpiration
What is the main source of water on Earth?
a) Lakes
b) Rain
c) Wells
d) Tap Water
Answer:
b) Rain
Which of these is NOT a source of fresh water?
a) River
b) Pond
c) Ocean
d) Lake
Answer:
c) Ocean
What is the process of water turning into ice called?
a) Condensation
b) Freezing
c) Evaporation
d) Precipitation
Answer:
b) Freezing
Which of the following is an underground source of water?
a) Lake
b) Pond
c) Well
d) River
Answer:
c) Well
Which is NOT a step in the water cycle?
a) Evaporation
b) Condensation
c) Filtration
d) Precipitation
Answer:
c) Filtration
The largest amount of Earth's fresh water is found in:
a) Rivers
b) Glaciers and Ice Caps
c) Underground Water
d) Lakes
Answer:
b) Glaciers and Ice Caps
What is the process in which water seeps through the soil and collects underground?
a) Evaporation
b) Precipitation
c) Infiltration
d) Condensation
Answer:
c) Infiltration
How does water from oceans return to land?
a) Through evaporation
b) Through precipitation
c) Through condensation
d) Through transpiration
Answer:
b) Through precipitation
Which of these activities does NOT help in water conservation?
a) Rainwater harvesting
b) Wasting water while brushing
c) Fixing water leaks
d) Reusing wastewater for gardening
Answer:
b) Wasting water while brushing
Which of the following is an artificial source of water?
a) River
b) Ocean
c) Dam
d) Lake
Answer:
c) Dam
What causes water pollution?
a) Throwing waste in rivers
b) Oil spills
c) Chemical waste
d) All of the above
Answer:
d) All of the above
The freezing point of water is:
a) 100°C
b) 50°C
c) 0°C
d) -10°C
Answer:
c) 0°C
The boiling point of water is:
a) 0°C
b) 100°C
c) 50°C
d) 200°C
Answer:
b) 100°C
Which of the following is the purest form of natural water?
a) Rainwater
b) River water
c) Well water
d) Lake water
Answer:
a) Rainwater
What is the main cause of floods?
a) Heavy rainfall
b) Deforestation
c) Melting of glaciers
d) All of the above
Answer:
d) All of the above
Water shortage can be reduced by:
a) Using water carefully
b) Wasting water
c) Cutting down trees
d) Polluting water
Answer:
a) Using water carefully
Which of the following is a method to conserve water?
a) Rainwater harvesting
b) Keeping taps open
c) Wasting water in washing cars
d) Using excess water for agriculture
Answer:
a) Rainwater harvesting
What happens when water is heated?
a) It melts
b) It condenses
c) It evaporates
d) It freezes
Answer:
c) It evaporates
Which of these does NOT contribute to groundwater depletion?
a) Overuse of borewells
b) Deforestation
c) Rainwater harvesting
d) Excessive irrigation
Answer:
c) Rainwater harvesting
Which of these is a way to purify water?
a) Boiling
b) Filtration
c) Chlorination
d) All of the above
Answer:
d) All of the above
Which of the following carries dissolved oxygen in water?
a) Air
b) Sunlight
c) Fish
d) Soil
Answer:
a) Air
What is the term for water that is safe for drinking?
a) Distilled water
b) Soft water
c) Potable water
d) Hard water
Answer:
c) Potable water
How much of the human body is made up of water?
a) 25%
b) 50%
c) 60-70%
d) 90%
Answer:
c) 60-70%
Water stored in soil is called:
a) Groundwater
b) Rainwater
c) Surface water
d) Seawater
Answer:
a) Groundwater
What percentage of Earth's surface is covered with water?
a) 50%
b) 60%
c) 71%
d) 90%
Answer:
c) 71%
Water is also called:
a) Universal solvent
b) Universal acid
c) Universal gas
d) Universal metal
Answer:
a) Universal solvent
Which of the following is a major cause of water pollution?
a) Planting more trees
b) Industrial waste disposal in rivers
c) Using less water
d) Rainwater harvesting
Answer:
b) Industrial waste disposal in rivers
What is the main reason for groundwater depletion?
a) Overuse of wells and borewells
b) Regular rainfall
c) Water conservation methods
d) Planting trees
Answer:
a) Overuse of wells and borewells
Which human activity contributes the most to water wastage?
a) Fixing leaking taps
b) Leaving taps open while brushing
c) Using rainwater for gardening
d) Recycling wastewater
Answer:
b) Leaving taps open while brushing
Which of the following methods is NOT used for water conservation?
a) Drip irrigation
b) Rainwater harvesting
c) Over-irrigation of fields
d) Building check dams
Answer:
c) Over-irrigation of fields
