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INTERPRET THE DATA Draw a simplified global water cycle showing ocean, land, atmosphere, and runoff from the land to the ocean. (a) Label your drawing with these annual water fiuxes: ocean evaporation, 425 km2: ocean evaporation that returns to the ocean as precipitation, 365 km2; ocean evaporation that falls as precipitation on land, 40 km2; evapotranspiration from plants and soil that falls as precipitation on land, 70 km2; runoff to the oceans, 40 km2. (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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