Earth: An Introduction to Physical Geology (12th Edition)

Published by Pearson
ISBN 10: 0134074254
ISBN 13: 978-0-13407-425-2

Chapter 24 - Give It Some Thought - Page 767: 10

Answer

If a large meteorite were to strike Earth in the near future, it would have significant effects on the atmosphere, temperatures, and climate. The impact itself would release an enormous amount of energy, causing a powerful explosion. The immediate consequences would include the ejection of a large quantity of dust, debris, and gases into the atmosphere. The injected particles and gases would have several impacts on the atmosphere. The most immediate effect would be a dramatic increase in the amount of dust and aerosols in the atmosphere, which would scatter and absorb sunlight. This would lead to a reduction in solar radiation reaching the Earth's surface, resulting in decreased temperatures. The dust and debris would also block sunlight, causing a period of darkness during the day. If these conditions persisted for several years, the changes in temperature and climate would have profound effects on the biosphere. The decreased sunlight and lower temperatures would impact photosynthesis, reducing the productivity of plants and primary producers. This, in turn, would affect the entire food chain, leading to disruptions in ecosystems and potential extinctions of species that are unable to adapt to the new conditions.

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