Quiz  /  Water Pollution Class 9 MCQ Questions With Answers

  • 1. 
    Lead in water is what kind of water pollution category?

  • organic
  • inorganic
  • nutrient
  • disease-causing organisms

  • 2. 
    Which is a category of water pollution?

  • sediment
  • medical
  • food
  • dihydrogen monoxide

  • 3. 
    Water regulations usually start around

  • parts per ten
  • parts per hundred
  • parts per thousand
  • parts per million

  • 4. 
    Warmer water tends to have

  • more dissolved oxygen
  • less phosphate
  • less nitrate
  • none of these

  • 5. 
    Too much phosphate in water is what category of water pollution?

  • organic
  • inorganic
  • nutrient
  • heat

  • 6. 
    Water pollution can be

  • biological
  • temperature
  • physical
  • all of these

  • 7. 
    Another way to talk about water pollution is to talk about water ______

  • quantity
  • speed
  • quality
  • all of these options

  • 8. 
    Why does chemical waste need to be disposed of carefully?

  • It encourages excessive plant growth
  • It contains heavy metals which build up in the tissues of living organisms.
  • It is not biodegradable
  • It depletes the oxygen levels in the water

  • 9. 
    In a residence, how is most (26%) of the water used?

  • Toilet
  • Bath/shower
  • Faucet
  • Dishwasher

  • 10. 
    Where is the majority (>60%) of the world's surface freshwater?

  • Canada
  • Near unpopulated areas
  • In large cities
  • On islands

  • 11. 
    What is true about eutrophication in lakes and other bodies of water?

  • it is always natural
  • it is always artificial
  • it can cause too much algae to grow
  • none of these are true

  • 12. 
    What would be an effective way to reduce plastic pollution?

  • Sell plastic waste to countries that need the money
  • Fine people who do not use litter bins
  • Reduce the amount of single-use items we use
  • Cover landfill sites so that plastics do not blow into the ocean

  • 13. 
    What do untreated (raw) sewage and fertilisers have in common?

  • They encourage excessive growth of aquatic plants
  • They are eaten by animals in the water
  • They accumulate in the tissues of aquatic organisms

  • 14. 
    What causes depletion of oxygen during eutrophication?

  • Excessive growth of plants on the surface
  • Death of fish
  • Death of plants beneath the surface
  • Increase of animals eating surface plants.

  • 15. 
    What can increase levels of nitrate in water?

  • sewage
  • pesticides
  • mining waste
  • all of these options

  • 16. 
    Phosphate can get into water because of what substances causing water pollution?

  • cleaning products
  • fertilizer
  • sewage
  • all of these options

  • 17. 
    Which of the following is NOT a major use of freshwater?

  • Residential
  • Agricultural
  • Industrial
  • Clouds

  • 18. 
    Which of the following is an unsafe material that can be found in drinking water?

  • Fish
  • Pathogens
  • Minerals
  • None of these

  • 19. 
    What can be toxic?

  • coffee
  • water
  • juice
  • all of these options

  • 20. 
    Water pollution includes

  • organisms in water that cause disease
  • water that is too cold
  • high amounts of dissolved oxygen
  • all of these options

  • 21. 
    What is true about water pollution?

  • all water is polluted
  • there is a way to make water 100% pure
  • nutrients are not pollutants
  • all of these are true

  • 22. 
    Why is untreated (raw) sewage dangerous to aquatic ecosystems?

  • It contains heavy metals
  • It contains plastics which are not biodegradable
  • It contains high quantities of the minerals needed for plant growth

  • 23. 
    What is a consequence of oxygen depletion during eutrophication?

  • Excessive growth of plants on the surface
  • Death of fish
  • Death of plants under the surface
  • Increase in animals that eat surface plants.

  • 24. 
    What is the biggest danger to humans of discarded rubbish?

  • Plastics break apart into smaller and smaller pieces
  • Animals eat it and it accumulates in their stomachs
  • Animals get stuck or tangled up in it and suffocate
  • We're running out of space in landfill

  • 25. 
    How much of water on Earth is FRESH SURFACE water?

  • 0.3%
  • 3%
  • 97%
  • 30%

  • 26. 
    What does "potable" mean?

  • Safe to drink
  • Frozen
  • Liquid water
  • Dirty water

  • 27. 
    How many gallons of water are used from Lake Michigan EACH DAY?

  • 100
  • 1 billion
  • 3 million
  • 1 million

  • 28. 
    What is virtual water?

  • Water on a computer screen
  • Water that is salty
  • Amount of water to create a product
  • Water that is frozen
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