Campbell Biology (11th Edition)
Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 55, Problem 9TYU

Level 3: Synthesis/Evaluation

9. DRAW IT (a) Draw a simplified global water cycle showing ocean, land, atmosphere, and runoff from the land to the ocean. Label your drawing with these annual water fluxes:

■ ocean evaporation, 425 km3

■ ocean evaporation that returns to the ocean as precipitation, 385 kin3

■ ocean evaporation that falls as precipitation on land, 40 km3

■ evapotranspiration from plants and soil that falls as precipitation on land, 70km3

■ runoff to the oceans, 40 km3

(b) What is the ratio of ocean evaporation that falls as precipitation on land compared with runoff from land to the oceans? (c) How would this ratio change during an ice age. and why?

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CASE STUDY CONNECTION California’s governor has put you in charge of water policy for the state. Aquifers beneath the state have been overpumped, and many wells have run dry. Agricultural production in the state is down, and farmers are clamoring for you to do something. Meanwhile, more water is needed for burgeoning urban populations in cities such as Los Angeles and San Francisco. What policies would you consider to restore California’s water supply? Would you try to take steps to increase supply, decrease demand, or both? Explain why you would choose such policies.
Please complete the following question. 5

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Campbell Biology (11th Edition)

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