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Olympiad (Class 5) Natural Environment — practice questions — page 2

Explore 46 free Natural Environment questions in Olympiad (Class 5) General Knowledge. Open each question or exercise to read its content, reference answers and available explanation.

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Natural Environment questions and exercises with answers

Showing questions 31–46 of 46.

Water deep inside an underground aquifer can stay there for about how long?Read the answer and worked solution →Where does most evaporation on Earth take place?Read the answer and worked solution →About what share of the world's rain and snow falls onto the ocean?Read the answer and worked solution →The slow movement of the big rocky plates of Earth's outer shell is known as what?Read the answer and worked solution →Which is the outermost solid layer of the Earth?Read the answer and worked solution →Which action matches the goals set by environmental scientists?Read the answer and worked solution →Why do scientists urge a switch from coal and oil to renewable energy?Read the answer and worked solution →Why do clouds form when moist air rises high up?Read the answer and worked solution →What mainly causes weather to differ from one place to another?Read the answer and worked solution →Snow and ice changing directly into water vapour, without melting first, is called what?Read the answer and worked solution →Why is air in the troposphere denser than in the layers above it?Read the answer and worked solution →Which Earth sphere do some scientists name separately for the ice on the planet?Read the answer and worked solution →Match each freshwater ecosystem with its hydrological nature:Read the answer and worked solution →Match each ecological symbiotic relationship with its definition:Read the answer and worked solution →Match each trophic level in a food chain with its ecological designation:Read the answer and worked solution →Match each biogeochemical cycle with the element it recycles:Read the answer and worked solution →

Worked practice questions

Water deep inside an underground aquifer can stay there for about how long?

  1. For a few weeks
  2. For thousands of years
  3. For a few hours
  4. For about one day
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Correct answer: B. For thousands of years

Groundwater moves and refills very slowly, so it can remain in an aquifer for thousands of years.

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Where does most evaporation on Earth take place?

  1. Over rivers
  2. Over ice caps
  3. Over deserts
  4. Over the oceans
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Correct answer: D. Over the oceans

About 86 percent of all evaporation takes place over the oceans, which hold most of the water.

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About what share of the world's rain and snow falls onto the ocean?

  1. 50 percent
  2. 100 percent
  3. 78 percent
  4. 22 percent
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Correct answer: C. 78 percent

About 78 percent of global precipitation falls over the ocean, and the rest falls on land.

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How to practise

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