On average, the ratio is 1, with equal amounts of water moving from the ocean to land
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Question:
On average, the ratio is 1, with equal amounts of water moving from the ocean to land as precipitation (40 km 3 /yr) and moving from land to ocean in runoff (also 40 km 3 /yr).
How would this ratio change during an ice age?
How would this ratio change during an ice age?
| The ratio would remain the same because, although the amount of precipitation would decrease, all the water falling on land would still return to the oceans as runoff. |
| The ratio would be > 1 because there would be more precipitation during an ice age. |
| The ratio would be > 1 because some precipitation would build up on land as ice. |
| The ratio would be < 1 because there would be less precipitation during an ice age. |
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