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Olympiad (Class 5) Pollution and Calamities — practice questions

Explore 61 free Pollution and Calamities questions in Olympiad (Class 5) Science. Open each question or exercise to read its content, reference answers and available explanation.

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Pollution and Calamities questions and exercises with answers

Showing questions 1–30 of 61.

Which of these is the best definition of pollution?Read the answer and worked solution →A factory chimney releases thick smoke all day. Which pollution does it mainly cause?Read the answer and worked solution →Loud horns and aircraft engines near a school cause which type of pollution?Read the answer and worked solution →Street lamps that are so bright that stars can hardly be seen cause which pollution?Read the answer and worked solution →Which gas from vehicle engines is poisonous and is a common air pollutant?Read the answer and worked solution →Which is one of the leading causes of air pollution in cities?Read the answer and worked solution →Which natural event can put large amounts of harmful gases into the air?Read the answer and worked solution →A forest fire started by lightning is a natural cause of which pollution?Read the answer and worked solution →Why is breathing heavy wildfire smoke dangerous?Read the answer and worked solution →Rain that is made acidic by sulfur dioxide and nitrogen oxides is called what?Read the answer and worked solution →What happens to soil when acid rain falls on it again and again?Read the answer and worked solution →How does thick smog harm green plants?Read the answer and worked solution →A farmer finds that crops no longer grow well because chemicals have spoiled his field. This is called what?Read the answer and worked solution →A power plant pours hot water into a river. Which pollution is this?Read the answer and worked solution →Why can warm water in a river kill fish?Read the answer and worked solution →Throwing wrappers and bottles on a road or park is called what?Read the answer and worked solution →Why is plastic waste a long-lasting problem?Read the answer and worked solution →How does plastic pollution harm sea animals?Read the answer and worked solution →Which action lowers pollution the most at its start?Read the answer and worked solution →Which habit helps reduce waste going to a dump?Read the answer and worked solution →Kitchen peels turned into manure by rotting is an example of what?Read the answer and worked solution →Pollution from one factory pipe is a point source. Which is a nonpoint source?Read the answer and worked solution →Which one is a point source of pollution?Read the answer and worked solution →Too much waste that rots in a lake uses up what that fish need?Read the answer and worked solution →Which gas rise is making the Earth's climate warmer?Read the answer and worked solution →When carbon dioxide dissolves in sea water, what slowly happens to the oceans?Read the answer and worked solution →When a poison builds up higher and higher along a food chain, it is called what?Read the answer and worked solution →Which group is hit hardest by pollution?Read the answer and worked solution →Which fertilizer and sewage effect can make a lake lose its oxygen?Read the answer and worked solution →Drinking polluted water mostly causes which kind of illness?Read the answer and worked solution →

Worked practice questions

Which of these is the best definition of pollution?

  1. Water turning into ice
  2. Plants growing in dry soil
  3. Rain falling on the hills
  4. Harmful matter in nature
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Correct answer: D. Harmful matter in nature

Pollution means contaminants are added to the natural environment and cause harm to it.

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A factory chimney releases thick smoke all day. Which pollution does it mainly cause?

  1. Soil pollution
  2. Noise pollution
  3. Air pollution
  4. Light pollution
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Correct answer: C. Air pollution

Smoke and gases from industry are released into the air, so the main harm is air pollution.

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Loud horns and aircraft engines near a school cause which type of pollution?

  1. Visual pollution
  2. Soil pollution
  3. Thermal pollution
  4. Noise pollution
Show answer and solution

Correct answer: D. Noise pollution

Roadway and aircraft sounds that are too loud are called noise pollution.

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