Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 2, The Chemistry of Life - Assessment - Analyzing Data - Page 58: 38



Work Step by Step

Option a. is incorrect. The period between noon and 6:00 P.M. saw the highest pH, which means the pond water was at its most basic level. Option b. is incorrect. At noon, the pH was at 8, which is at a basic level and is not acidic. Option d. is incorrect. At 6:00 P.M., the pH was at 7.5, which is at a basic level. Option c. is correct. Between the hours of midnight and 6:00 A.M., the pH level of the pond was under 7, meaning that the water was acidic during this period of time.
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