Sociology 2173A/B Chapter 8: Chapter 8 - Textbook.docx

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Lowell: mapped the martian canals, thought that the canals were built to carry water from the poles to thirsty cities near the equator, arguments, other astronomers didn"t see the same canals he was referring to, mars too cold for water to flow, lowell"s canals were straight lines, didn"t follow the contours of the suface, brought personal bias into his work, so convinced he ignored all evidence against it. Southern hemisphere has more extreme seasons (shorter and warmer summers, longer and colder winters) than northern hemisphere because planet orbits faster when its closer to the sun: dust devils, swirling winds that are similar to winds over desert sands, like tornados except they rise up from the ground, popular during the summer. Map of mars: half as large in diameter as earth, surface area that of earth, southern hemisphere, relatively high elevation, scarred by numerous large impact craters, northern hemisphere, plains.

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