MCQ questions for class 6 Science Chapter 14 Water
Question 1: What is the chemical formula for water?
H2O
CO2
O2
HCl
Question 2: What percentage of the Earth's surface is covered by water?
50%
70%
90%
30%
Question 3: Which of the following is a source of freshwater?
Ocean
River
Sea
Pond
Question 4: What is the process of changing water vapor into liquid water called?
Evaporation
Condensation
Sublimation
Precipitation
Question 5: Which of the following is a greenhouse gas released during the burning of fossil fuels?
Oxygen
Carbon dioxide
Nitrogen
Hydrogen
Question 6: What is the primary source of energy for the water cycle?
Sun
Moon
Stars
Wind
Question 7: What is the name of the process in which plants release water vapor through small pores on their leaves?
Photosynthesis
Transpiration
Respiration
Digestion
Question 8: What is the name of the largest ocean on Earth?
Atlantic Ocean
Indian Ocean
Southern Ocean
Pacific Ocean
Question 9: Which of the following is a form of water precipitation?
Rain
Fog
Dew
All of the above
Question 10: What is the name of the process in which water droplets combine to form larger droplets and fall as precipitation?
Evaporation
Condensation
Sublimation
Precipitation
Question 11: What is the term for the natural underground reservoir of water?
River
Lake
Aquifer
Pond
Question 12: Which of the following is a human-made source of water?
Well
Spring
Lake
River
Question 13: What is the process of water seeping into the ground called?
Transpiration
Percolation
Evaporation
Condensation
Question 14: What is the name of the frozen form of water?
Rain
Snow
Hail
Sleet
Question 15: Which of the following is a natural source of water?
Tap
Borewell
Spring
Reservoir
Question 16: What is the term for the process of water returning to the atmosphere from the Earth's surface?
Evaporation
Condensation
Transpiration
Precipitation
Question 17: Which of the following is a method of water conservation?
Leaving taps open
Wasting water
Rainwater harvesting
All of the above
Question 18: What is the term for the water stored underground that can be tapped for wells and springs?
Reservoir
Aquifer
River
Lake
Question 19: What is the name of the process in which water absorbs heat and changes into water vapor?
Evaporation
Condensation
Transpiration
Precipitation
Question 20: What is the term for the total amount of water vapor in the air?
Humidity
Temperature
Pressure
Density
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