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If the average annual rainfall and evaporation over land masses and oceans of the earth are considered it would be found that
  • a)
    over the land mass the annual evaporation is the same as the annual precipitation
  • b)
    about 9% more, water evaporates from the oceans than what falls back on them as precipitation
  • c)
    over the oceans about 19% more rain falls than what is evaporated
  • d)
    over the oceans about 19% more water evaporates than what falls back on them as precipitation
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
If the average annual rainfall and evaporation over land masses and oc...
Whenever precipitation occurs, a part of rainfall is infiltrated into the soil and other part is surface runoff meeting in the rivers. 
Moreover, not all the water evaporated from the sea is transported towards land and most of it fall back as precipitation in oceans itself.
Therefore, it is found that about 9% more, water evaporates from the ocean than what falls back them as precipitation.
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Most Upvoted Answer
If the average annual rainfall and evaporation over land masses and oc...
Average Annual Rainfall and Evaporation over Land Masses and Oceans

B. About 9% more water evaporates from the oceans than what falls back on them as precipitation.

Explanation:

Annual rainfall and evaporation are the two most important hydrologic variables that determine the water balance of the earth. The water cycle is an essential process and is responsible for the distribution of freshwater resources across the globe. The average annual rainfall and evaporation over land masses and oceans of the earth are considered to estimate the water balance.

- Water Balance:

The water balance is the relationship between precipitation and evapotranspiration. Precipitation is the amount of water that falls from the atmosphere and reaches the earth's surface. Evapotranspiration is the combined process of evaporation and plant transpiration. It is the amount of water that returns to the atmosphere through the processes of evaporation and transpiration.

- Land Masses:

Over the land mass, the annual evaporation is less than the annual precipitation. This is because the land surface has a lower heat capacity than water and therefore warms up faster. This results in more evaporation from the land surface. The precipitation that falls on the land surface is absorbed by the soil and vegetation or flows into rivers and streams.

- Oceans:

Over the oceans, about 9% more water evaporates than what falls back on them as precipitation. This is because the oceans have a higher heat capacity than land and therefore take longer to warm up. This results in more evaporation from the ocean surface. The precipitation that falls on the ocean surface is absorbed by the ocean or flows into rivers and streams.

Conclusion:

In conclusion, the average annual rainfall and evaporation over land masses and oceans of the earth are important hydrologic variables that determine the water balance. Over the land mass, the annual evaporation is less than the annual precipitation, while over the oceans, about 9% more water evaporates than what falls back on them as precipitation.
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If the average annual rainfall and evaporation over land masses and oceans of the earth are considered it would be found thata)over the land mass the annual evaporation is the same as the annual precipitationb)about 9% more, water evaporates from the oceans than what falls back on them as precipitationc)over the oceans about 19% more rain falls than what is evaporatedd)over the oceans about 19% more water evaporates than what falls back on them as precipitationCorrect answer is option 'B'. Can you explain this answer?
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If the average annual rainfall and evaporation over land masses and oceans of the earth are considered it would be found thata)over the land mass the annual evaporation is the same as the annual precipitationb)about 9% more, water evaporates from the oceans than what falls back on them as precipitationc)over the oceans about 19% more rain falls than what is evaporatedd)over the oceans about 19% more water evaporates than what falls back on them as precipitationCorrect answer is option 'B'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about If the average annual rainfall and evaporation over land masses and oceans of the earth are considered it would be found thata)over the land mass the annual evaporation is the same as the annual precipitationb)about 9% more, water evaporates from the oceans than what falls back on them as precipitationc)over the oceans about 19% more rain falls than what is evaporatedd)over the oceans about 19% more water evaporates than what falls back on them as precipitationCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If the average annual rainfall and evaporation over land masses and oceans of the earth are considered it would be found thata)over the land mass the annual evaporation is the same as the annual precipitationb)about 9% more, water evaporates from the oceans than what falls back on them as precipitationc)over the oceans about 19% more rain falls than what is evaporatedd)over the oceans about 19% more water evaporates than what falls back on them as precipitationCorrect answer is option 'B'. Can you explain this answer?.
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