Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 16 - Think and Explain: 64

Answer

Because there is less dense air, and lower pressure above, faster-moving air molecules migrate upward, starting convection currents.

Work Step by Step

This is discussed on pages 305-306.
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