Cambridge IGCSE · Environmental Management (0680)
5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Global water distribution.
A pie chart shows global water distribution. If the total volume of water on Earth is represented by the entire chart, and 97% of this water is found in the oceans, which of the following is the most accurate description of the remaining 3%?
In the context of global water distribution, which of the following represents the smallest percentage of the Earth's total freshwater supply?
Although rivers are a primary source for human water supply, they represent what approximate percentage of the Earth's total water?
In the context of the global water distribution, why is the water found in the atmosphere and soil moisture often excluded from calculations of "available freshwater resources" for large-scale agricultural or industrial use?
While oceans contain approximately \(97.5\%\) of Earth's total water, only about \(2.5\%\) is fresh water. If the Earth's total water volume is represented as \(100\) litres, how many litres would be liquid fresh water available in lakes, rivers, and ground water?
State the location where the vast majority of the Earth's fresh water is stored in a frozen state.
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Explain why the volume of water stored in the atmosphere is significantly smaller than that stored in ground water, despite its vital role in the water cycle.
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If the total volume of Earth's water is approximately \(1,386\) million \(km^3\) and oceans make up \(97.5\%\) of this, calculate the total volume of fresh water available in million \(km^3\) and explain why most of it is inaccessible.
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(a) State where the majority of the Earth's water is stored.
(b) Identify two specific locations where fresh water is stored in the global water distribution.
(c) Explain why a large proportion of the Earth's fresh water is not easily accessible for human consumption.
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Compare the distribution of water in the oceans with the distribution of fresh water in the ground.
(a) Contrast the salinity and volume of these two stores.
(b) Explain why ground water is considered a 'finite' resource in many parts of the world, even though it is part of the global water distribution.
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