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Olympiad (Class 7) Natural resources and their conservation — practice questions — page 2

Explore 58 free Natural resources and their conservation questions in Olympiad (Class 7) Science. Open each question or exercise to read its content, reference answers and available explanation.

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Natural resources and their conservation questions and exercises with answers

Showing questions 31–58 of 58.

Stripping trees from a steep hillside most raises the risk ofRead the answer and worked solution →Cutting large forests lets which gas linger in the air?Read the answer and worked solution →Extra carbon dioxide trapping heat in the air leads toRead the answer and worked solution →Rainforests are a special concern because they hold most of Earth'sRead the answer and worked solution →The IUCN Red List is best known as a worldwide list ofRead the answer and worked solution →Removing a keystone species from an ecosystem most likely causesRead the answer and worked solution →Which group's sensitive skin makes it a warning sign of an unhealthy wetland?Read the answer and worked solution →Why are species with narrow ecological needs useful health monitors?Read the answer and worked solution →Protecting one wide-ranging species also shelters many others. It is called anRead the answer and worked solution →In the HIPPO list of biodiversity threats, the H stands forRead the answer and worked solution →An alien plant spreads and crowds out local plants. Which HIPPO threat is it?Read the answer and worked solution →Biological material from living or recently living organisms, mostly plants, isRead the answer and worked solution →Biogas made from cow dung is mostly which gas?Read the answer and worked solution →Biogas forms when organic waste decays in the absence ofRead the answer and worked solution →Bioethanol is made by fermenting which crops?Read the answer and worked solution →Biodiesel is produced from vegetable oils andRead the answer and worked solution →Which pair are both renewable energy sources?Read the answer and worked solution →Burning wood on a poorly ventilated indoor stove can causeRead the answer and worked solution →Buying vegetables at a nearby market instead of a distant one savesRead the answer and worked solution →Thermoelectric power plants use large amounts of water mainly forRead the answer and worked solution →At a basic level, every man-made product is made fromRead the answer and worked solution →A farming system that can last over the long term is calledRead the answer and worked solution →Clearing forest for more farmland mainly lowersRead the answer and worked solution →Which is an indirect driver of resource depletion?Read the answer and worked solution →Along with agriculture, extractive industries form the economy'sRead the answer and worked solution →A lake replenishes 10 tonnes of fish yearly and 8 tonnes are caught. The catch isRead the answer and worked solution →Alternating deep-rooted and shallow-rooted crops improves soilRead the answer and worked solution →Yearly river floods on cropland help farming by returningRead the answer and worked solution →

Worked practice questions

Stripping trees from a steep hillside most raises the risk of

  1. More groundwater
  2. Deeper topsoil
  3. Cooler summers
  4. Landslides
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Correct answer: D. Landslides

Deforestation reduces soil cohesion, so erosion, flooding and landslides follow.

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Cutting large forests lets which gas linger in the air?

  1. Pure oxygen
  2. Carbon dioxide
  3. Helium gas
  4. Nitrogen gas
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Correct answer: B. Carbon dioxide

Trees absorb carbon dioxide, so deforestation leaves more of it in the atmosphere.

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Extra carbon dioxide trapping heat in the air leads to

  1. Ozone growth
  2. Tidal waves
  3. Acid soil
  4. Global warming
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Correct answer: D. Global warming

Carbon dioxide traps radiation as heat, which causes global warming known as the greenhouse effect.

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How to practise

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