8th Grade: How Much Do You Actually Know About Earth Science?

10 Questions | Total Attempts: 177

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8th Grade: How Much Do You Actually Know About Earth Science? - Quiz

While our planet is 70% water only 3% of that water is available as freshwater - and two-thirds of that are locked up as ice! 1. 1 billion people in the world don’t have access to safe drinking water, and a further 2. 7 billion find it difficult to get access to clean water for at least one month of the year.


Questions and Answers
  • 1. 
    Which of the following is not a problem with water supplies in LEDCs?
    • A. 

      Lack of available clean water

    • B. 

      Diseases spread via the water supply

    • C. 

      Water pollution

    • D. 

      There is no water available

  • 2. 
    Which of the following is not a method of harvesting water?
    • A. 

      Collecting rainwater off roofs

    • B. 

      Damming areas to catch runoff during times of heavy rainfall

    • C. 

      Borehole drilling to reach the water table

    • D. 

      Storing water from rivers during seasonal high waters or flooding

  • 3. 
    How does providing appropriately built and sited toilets increase the availability of fresh water in locations with no running water supplies?
    • A. 

      Toilets can contaminate wells and other water sources with raw sewage if inappropriately built or sited

    • B. 

      Placing toilets far from a settlement will mean less of its fresh water is used for waste disposal

    • C. 

      Using waste water to flush toilets will save fresh water

    • D. 

      Putting the toilets next to the well means that all the infrastructure is located together

  • 4. 
    What is an advantage of boreholes over hand dug wells?
    • A. 

      They require a pump to bring up the water from the depths

    • B. 

      Since they reach the water table, they are a more reliable and cleaner source of water

    • C. 

      They need the area to be surveyed to find the correct location for the well to be sunk

    • D. 

      They require equipment and skills that often have to be brought in

  • 5. 
    Why might wells be a suitable source of water?
    • A. 

      The water will never become contaminated

    • B. 

      They can be dug easily by hand

    • C. 

      The water will never dry up if the water table lowers

    • D. 

      Wells may collapse

  • 6. 
    Which of the following is not a way that providing clean water benefits local populations?
    • A. 

      It reduces disease and illness from contaminated water

    • B. 

      It increases the time available for work and education

    • C. 

      It reduces the cost of drinking water

    • D. 

      It allows local businesses to profit by selling clean water at high cost

  • 7. 
    Charities often report that they are providing new spring fed systems in areas that already have a non-functioning one. Why might it be the case that the systems provided are falling into disrepair?
    • A. 

      The local population lack the skills and tools to keep them repaired

    • B. 

      The systems are designed so only the people that install them can maintain them

    • C. 

      The local people would rather leave it for the charities to repair

    • D. 

      The equipment is almost impossible to maintain without very expensive tools

  • 8. 
    The Pergau Dam project was one in which the British Government agreed to build a dam to provide electricity and clean water in Malaysia. However, there was a condition - Malaysia purchased arms from Britain in return for the aid. It was later shown that the electricity could have been produced in a more effective manner. What is this sort of aid deal, where conditions are attached that do not benefit the poorest sections of the population, referred to as?
    • A. 

      Tied aid

    • B. 

      Brokered aid

    • C. 

      International aid

    • D. 

      Trade agreements

  • 9. 
    What is one of the main reasons domestic use of water is higher in MEDCs than in LEDCs?
    • A. 

      People in MEDCs tend to drink more water

    • B. 

      Labour saving devices, such as washing machines and dishwashers, are more popular in MEDCs

    • C. 

      In MEDCs, people leave the taps running when not needed

    • D. 

      Fishponds and swimming pools are much more common in MEDCs

  • 10. 
    Which of the following is one way that education can help safeguard water supplies in poorer areas of LEDCs?
    • A. 

      Teaching farmers to use less water intensive crops

    • B. 

      Stop all pollution entering rivers

    • C. 

      Increase the amount of water entering the system

    • D. 

      Reduce flood events by reducing the amount people discharge into rivers

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