Quiz on Water | 20 MCQs and Answers

Question 1:
What is the chemical formula for water?
A) H2O
B) CO2
C) O2
D) H2SO4


Question 2:
What percentage of the Earth's surface is covered by water?
A) 50%
B) 60%
C) 70%
D) 80%


Question 3:
What is the largest ocean on Earth?
A) Atlantic Ocean
B) Indian Ocean
C) Arctic Ocean
D) Pacific Ocean


Question 4:
Which process describes the change of water from a liquid to a gas?
A) Condensation
B) Sublimation
C) Evaporation
D) Precipitation


Question 5:
What is the main source of energy that drives the water cycle?
A) Wind
B) The Moon
C) The Sun
D) Geothermal heat



Question 6:
What is the term for water that falls from the atmosphere as rain, snow, sleet, or hail?
A) Condensation
B) Precipitation
C) Evaporation
D) Transpiration


Question 7:
Which of the following is a freshwater source?
A) Ocean
B) Sea
C) River
D) Gulf


Question 8:
What percentage of the Earth's water is freshwater?
A) 1%
B) 3%
C) 10%
D) 20%


Question 9:
Which gas is most commonly dissolved in ocean water?
A) Oxygen
B) Nitrogen
C) Carbon Dioxide
D) Hydrogen


Question 10:
What is the term for the movement of water into the atmosphere from plants?
A) Transpiration
B) Evaporation
C) Condensation
D) Precipitation


Question 11:
What is the process called when water vapor cools and changes into liquid droplets?
A) Evaporation
B) Precipitation
C) Condensation
D) Sublimation


Question 12:
Which is the largest freshwater lake by volume in the world?
A) Lake Superior
B) Lake Victoria
C) Lake Tanganyika
D) Lake Baikal


Question 13:
What is the term for underground layers of rock that hold groundwater?
A) Aquifers
B) Basins
C) Reservoirs
D) Springs


Question 14:
Which country is home to the most extensive canal system in the world?
A) United States
B) China
C) India
D) Netherlands


Question 15:
What is the name of the longest river in the world?
A) Amazon River
B) Nile River
C) Yangtze River
D) Mississippi River


Question 16:
Which process describes water seeping down through the soil to replenish aquifers?
A) Evaporation
B) Runoff
C) Infiltration
D) Transpiration


Question 17:
What is the main cause of ocean tides?
A) Wind
B) Earth's rotation
C) The Moon's gravitational pull
D) Underwater volcanoes


Question 18:
What percentage of the human body is made up of water?
A) 50%
B) 60%
C) 70%
D) 80%


Question 19:
What is the salinity of seawater?
A) 1%
B) 3.5%
C) 7%
D) 10%


Question 20:
Which river flows through the most countries?
A) Danube
B) Amazon
C) Congo
D) Rhine

Solve this Water Quiz on your own