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Olympiad (Class 5) Pollution and Calamities — practice questions — page 2

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 31–60 of 61.

Diseases spread through dirty water are called what?Read the answer and worked solution →Which is the safest way to deal with household dirty water before it reaches a river?Read the answer and worked solution →Which of these is a natural disaster?Read the answer and worked solution →An earthquake in an empty desert harms nobody. Why is it not a disaster?Read the answer and worked solution →What decides how bad the damage from a natural disaster is?Read the answer and worked solution →A natural hazard is best described as what?Read the answer and worked solution →What is the shaking of the ground caused by a sudden release of energy in Earth's crust?Read the answer and worked solution →What is the point on the ground directly above an earthquake's underground origin called?Read the answer and worked solution →Earthquakes cause deaths mostly through what?Read the answer and worked solution →Which step can best reduce deaths in a future earthquake?Read the answer and worked solution →A depression suddenly forms in the ground when the surface layer collapses. What is it?Read the answer and worked solution →Waves and currents slowly wearing away a shoreline cause what?Read the answer and worked solution →Hot melted rock flowing from a volcano is called what?Read the answer and worked solution →Which of these is a danger of a volcanic eruption?Read the answer and worked solution →The Japanese word tsunami means what in English?Read the answer and worked solution →Which event under the sea can send out a tsunami?Read the answer and worked solution →Besides undersea earthquakes, a tsunami can also be caused by which event?Read the answer and worked solution →A very long period of unusually hot weather is called what?Read the answer and worked solution →Which can start a wildfire without any human help?Read the answer and worked solution →What is a flood?Read the answer and worked solution →A river rises and covers village fields and roads. What is this event?Read the answer and worked solution →A flood is a major event only if water covers what?Read the answer and worked solution →Lightning can harm people and places in which way?Read the answer and worked solution →A country builds desalination plants after years of very little rain. Which disaster led to this?Read the answer and worked solution →Which volcano rating level marks a supervolcano?Read the answer and worked solution →Which choice makes natural disasters worse?Read the answer and worked solution →A hazard becomes a disaster when it strikes what?Read the answer and worked solution →Match each natural disaster / calamity with its geophysical cause:Read the answer and worked solution →Match each meteorological calamity with its weather extreme:Read the answer and worked solution →Match each environmental pollution form with its primary human cause:Read the answer and worked solution →

Worked practice questions

Diseases spread through dirty water are called what?

  1. Airborne diseases
  2. Waterborne diseases
  3. Soil diseases
  4. Sound diseases
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Correct answer: B. Waterborne diseases

Illnesses carried by polluted water are known as waterborne diseases.

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Which is the safest way to deal with household dirty water before it reaches a river?

  1. Pour it straight in
  2. Treat it first
  3. Mix it with oil
  4. Add plastic to it
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Correct answer: B. Treat it first

Untreated sewage is a major water pollutant, so water should be treated before release.

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Which of these is a natural disaster?

  1. A big earthquake
  2. A school picnic
  3. A cricket match
  4. A bus ride
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Correct answer: A. A big earthquake

An earthquake is a natural hazard that can seriously harm a community.

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