Water Resources in Earth Science
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Questions and Answers

What percentage of Earth's total water is classified as freshwater available for human use?

  • 0.4% (correct)
  • 2.5%
  • 1.5%
  • 3.0%
  • Which type of water footprint refers to water sourced from precipitation stored in the soil's root zone?

  • Blue water footprint
  • Green water footprint (correct)
  • Surface water footprint
  • Grey water footprint
  • What percentage of Earth's freshwater is found in surface water bodies such as lakes and rivers?

  • 5.0%
  • 2.5%
  • 0.3% (correct)
  • 0.1%
  • What is the primary characteristic of blue water footprint?

    <p>Water sourced from surface or groundwater resources</p> Signup and view all the answers

    What holds the largest volume of fresh surface water on Earth?

    <p>Lakes</p> Signup and view all the answers

    What is the function of grey water footprint?

    <p>Water required for pollution assimilation</p> Signup and view all the answers

    Which of the following describes the majority of Earth's water?

    <p>Saline water in oceans</p> Signup and view all the answers

    In the hydrologic cycle, where does water exist apart from surface and underground?

    <p>In the air</p> Signup and view all the answers

    What percentage of the world's land surface do wetlands cover?

    <p>6%</p> Signup and view all the answers

    What is the primary use of groundwater extracted in arid and semi-arid climates?

    <p>Farming</p> Signup and view all the answers

    What is one intended purpose of constructing a dam?

    <p>Regulating stream flow</p> Signup and view all the answers

    Which type of hydropower plant involves the storage and regulated release of water?

    <p>Impoundment Plant</p> Signup and view all the answers

    What is the efficiency rate of energy conversion in hydropower plants?

    <p>90%</p> Signup and view all the answers

    What percentage of the world’s drinking water comes from underground sources?

    <p>25% to 40%</p> Signup and view all the answers

    Which of the following is NOT an advantage of hydropower plants?

    <p>High upfront costs</p> Signup and view all the answers

    How much of the liquid fresh water on Earth is found underground?

    <p>96%</p> Signup and view all the answers

    Study Notes

    Distribution of Water Resources

    • Earth's water distribution: 97.5% in oceans, 2.5% as freshwater.
    • Freshwater availability: 0.4% of total water is easily usable by humans.
    • Most freshwater is stored as ice.

    Hydrologic Cycle

    • Water exists in various forms: atmospheric, surface, underground, and oceanic.

    Availability of Water Resources

    Water Footprints

    • Green water footprint: precipitation stored in soil root zones, used by plants.
    • Blue water footprint: sourced from surface or groundwater, includes evaporation and product incorporation.
    • Grey water footprint: freshwater needed to assimilate pollutants for water quality standards.

    Surface and Groundwater Resources

    • Surface freshwater constitutes 0.3% of Earth's total water, including lakes, rivers, and wetlands.
    • Lakes contain the majority of fresh surface water.
    • Wetlands cover 6% of land and are vital for water conservation.
    • Groundwater comprises 96% of liquid freshwater, supporting ecosystems and human activities.
    • Approximately 60% of groundwater is used for agriculture in arid regions, with 25-40% providing drinking water.

    Dams and Hydropower Plants

    Dams as Water Supply Storage

    • Dams serve multiple purposes: create reservoirs, regulate stream flow, and manage flooding.
    • They often function alongside hydropower plants to generate electricity.

    Types of Hydropower Plants

    • Three types of hydropower plants:
      • Impoundment
      • Diversion
      • Pumped Storage

    Advantages of Hydropower Plants

    • Renewable energy source with quick resource recovery.
    • High efficiency: 90% of mechanical energy converted to electricity.
    • Low maintenance costs make it an attractive energy solution.

    Inspirational Quote

    • "Thousands have lived without love, but one without water..." - W.H. Auden.

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    Description

    Explore the distribution, availability, and management of water resources in this Earth Science quiz. Discover the hydrologic cycle, water footprints, and the significance of dams and hydropower plants in sustainable water supply. Test your knowledge on how water resources impact both the environment and society.

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