Podcast
Questions and Answers
What percentage of the world's total water volume is estimated to exist as freshwater?
What percentage of the world's total water volume is estimated to exist as freshwater?
- 2.5% (correct)
- 3.5%
- 4.5%
- 1.5%
Where is nearly 70% of the freshwater found?
Where is nearly 70% of the freshwater found?
- Underground aquifers
- Lakes and rivers
- Atmosphere as vapor
- Ice sheets and glaciers (correct)
What is the main source of obtaining freshwater mentioned in the text?
What is the main source of obtaining freshwater mentioned in the text?
- Water recycling technology
- Desalination of seawater
- Surface run off and ground water (correct)
- Melting ice caps
What proportion of the earth's surface is covered with water?
What proportion of the earth's surface is covered with water?
Why is it predicted that nearly two billion people will live in absolute water scarcity by 2025?
Why is it predicted that nearly two billion people will live in absolute water scarcity by 2025?
What is the hydrological cycle and how does it ensure that water is a renewable resource?
What is the hydrological cycle and how does it ensure that water is a renewable resource?
Explain why despite water being a renewable resource, countries and regions around the globe suffer from water scarcity.
Explain why despite water being a renewable resource, countries and regions around the globe suffer from water scarcity.
What percentage of the world's total water volume is estimated to exist as freshwater, and where is nearly 70% of this freshwater found?
What percentage of the world's total water volume is estimated to exist as freshwater, and where is nearly 70% of this freshwater found?
What are the main sources of obtaining freshwater mentioned in the text, and how are they related to the hydrological cycle?
What are the main sources of obtaining freshwater mentioned in the text, and how are they related to the hydrological cycle?
What is the predicted scenario regarding the number of people living in absolute water scarcity by 2025, and what factors contribute to this prediction?
What is the predicted scenario regarding the number of people living in absolute water scarcity by 2025, and what factors contribute to this prediction?
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Study Notes
Water Resources
- Only 2.5% of the world's total water volume is estimated to exist as freshwater.
- Nearly 70% of this freshwater is found in the form of ice caps, glaciers, and permanent snow.
Hydrological Cycle
- The hydrological cycle ensures that water is a renewable resource through the continuous process of evaporation, condensation, and precipitation.
- This cycle allows water to be continuously cycled back into the environment, making it a renewable resource.
Water Scarcity
- Despite water being a renewable resource, countries and regions around the globe suffer from water scarcity due to factors such as:
- Uneven distribution of freshwater resources
- Increasing population growth and urbanization
- Climate change affecting precipitation patterns
- Inefficient use and management of water resources
Predicted Water Scarcity Scenario
- By 2025, it is predicted that nearly two billion people will live in absolute water scarcity.
- Factors contributing to this prediction include:
- Population growth and urbanization
- Climate change
- Inefficient use and management of water resources
Obtaining Freshwater
- The main source of obtaining freshwater is through the hydrological cycle, which involves precipitation and runoff.
- Other sources of obtaining freshwater mentioned in the text include:
- Ice caps
- Glaciers
- Permanent snow
Water Coverage on Earth
- Approximately 71% of the earth's surface is covered with water.
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