Read the following passages and answer these questions for each one: 1. What is the phenomenon being explained? 2. What theories are given to explain the phenomenon? (Some theories may be unstated.) 3. Which theory seems the most plausible and why? (Use the criteria of adequacy.) 4. Which theory is the least plausible and why? 5. Regarding the most credible theory, what factors would convince you to regard it as even more plausible? 6. Regarding the least credible theory, what factors would convince you to regard it as much more plausible? PASSAGE 1 “Since Venus rotates so slowly, we might be tempted to conclude that Venus, like Mercury, keeps one face always toward the Sun. If this hypothesis were cor- rect we should expect that the dark side would be exceedingly cold. Pettit and Nicholson have measured the temperature of the dark side of Venus. They find that the temperature is not low, its value being only 29F degrees, much warmer than our stratosphere in broad daylight. It is unlikely that atmospheric currents from the bright side of Venus could perpetually heat the dark side. The planet must rotate fairly often to keep the dark side from cooling excessively.”12

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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Read the following passages and answer these questions for each one: 1. What is the phenomenon being explained? 2. What theories are given to explain the phenomenon? (Some theories may be unstated.) 3. Which theory seems the most plausible and why? (Use the criteria of adequacy.) 4. Which theory is the least plausible and why? 5. Regarding the most credible theory, what factors would convince you to regard it as even more plausible? 6. Regarding the least credible theory, what factors would convince you to regard it as much more plausible? PASSAGE 1 “Since Venus rotates so slowly, we might be tempted to conclude that Venus, like Mercury, keeps one face always toward the Sun. If this hypothesis were cor- rect we should expect that the dark side would be exceedingly cold. Pettit and Nicholson have measured the temperature of the dark side of Venus. They find that the temperature is not low, its value being only 29F degrees, much warmer than our stratosphere in broad daylight. It is unlikely that atmospheric currents from the bright side of Venus could perpetually heat the dark side. The planet must rotate fairly often to keep the dark side from cooling excessively.”12
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