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CTET Water — practice questions — page 2

Explore 66 free Water questions in CTET Environmental Studies. Open each question or exercise to read its content, reference answers and available explanation.

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Water questions and exercises with answers

Showing questions 31–60 of 66.

Covering ground with concrete in cities mainly leads to what?Read the answer and worked solution →Which is a harmful effect of building dams on rivers?Read the answer and worked solution →Where does most of the world's evaporation take place?Read the answer and worked solution →What share of global precipitation falls over the ocean?Read the answer and worked solution →Where can snow that falls as precipitation be stored as ice for thousands of years?Read the answer and worked solution →Over long periods, how does the total mass of water on Earth behave?Read the answer and worked solution →Why does rising water vapour condense into cloud droplets?Read the answer and worked solution →World Water Day is celebrated on which date?Read the answer and worked solution →Which best describes water efficiency, not conservation?Read the answer and worked solution →What is rainwater harvesting?Read the answer and worked solution →Why must groundwater be kept free of pollution?Read the answer and worked solution →Over-pumping groundwater in coastal regions can cause what?Read the answer and worked solution →What is a tiered water rate?Read the answer and worked solution →The US EPA estimates metering alone can cut household water use by roughly how much?Read the answer and worked solution →About what share of the world's fresh water use goes to crop irrigation?Read the answer and worked solution →Which irrigation method is the oldest and most common but often uneven?Read the answer and worked solution →In farming, liquid water above and below ground is called?Read the answer and worked solution →How can a plastic sheet laid over farm soil help save water?Read the answer and worked solution →Which of these does sand filtration struggle most to remove from water?Read the answer and worked solution →What share of the world's people live where water demand exceeds supply?Read the answer and worked solution →What does a half-flush option on a toilet help to do?Read the answer and worked solution →Newer water-saving shower fixtures use about how many gallons of water per minute?Read the answer and worked solution →Why is water sent down a drain not truly destroyed?Read the answer and worked solution →About what share of water do high-income countries use for industry?Read the answer and worked solution →Where is rooftop rainwater usually directed to be stored?Read the answer and worked solution →Rainwater harvesting is among the simplest, oldest methods of what?Read the answer and worked solution →Which is a common part of a basic rainwater harvesting system?Read the answer and worked solution →A rainwater tank is ideally sized to meet demand during which period?Read the answer and worked solution →Why are check dams built across streams?Read the answer and worked solution →Frankfurt Airport uses its harvested rainwater mainly for what?Read the answer and worked solution →

Worked practice questions

Covering ground with concrete in cities mainly leads to what?

  1. Less surface runoff
  2. More infiltration into soil
  3. More groundwater recharge
  4. More surface runoff
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Correct answer: D. More surface runoff

1. Concrete and roads are impervious, so water cannot soak in. 2. Infiltration falls and surface runoff rises. 3. More infiltration or recharge would need open soil. _Source: Wikipedia, Water cycle, Land cover and land use changes_

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Which is a harmful effect of building dams on rivers?

  1. Loss of habitat for fish
  2. Better river water quality
  3. Unchanged natural flow
  4. More fresh groundwater
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Correct answer: A. Loss of habitat for fish

1. Dams change how a river flows. 2. They can lower water quality and cause loss of habitat for aquatic species. 3. Quality does not improve, flow does not stay natural and groundwater is not the stated gain. _Source: Wikipedia, Water cycle, Land cover and land use changes_

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Where does most of the world's evaporation take place?

  1. Rivers and streams
  2. The open oceans
  3. Lakes and ponds
  4. Soil on dry land
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Correct answer: B. The open oceans

1. Oceans cover most of the planet and hold most of its water. 2. About 86 percent of global evaporation occurs over the ocean. 3. Rivers, lakes and soil together give far less. _Source: Wikipedia, Water cycle, Overall process_

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