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

by Tarbuck, Edward J.; Lutgens, Frederick K.; Tasa, Dennis G.

Published by Pearson

ISBN 10: 0134074254

ISBN 13: 978-0-13407-425-2

Chapter 22 - Section 22.3 - Origin and Evolution of the Atmosphere and Oceans - Concept Checks - Page 675: 4

Answer

The rainwater was highly acidic early in the Earth's history. This was due to continuous volcanic eruptions which lead to the release of huge amounts of sulfur dioxide into the atmosphere. Sulfur dioxide combined with water in the atmosphere and resulted in the formation of hydrochloric acid. This made the rainwater highly acidic.

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