Conceptual Physics (12th Edition)

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

Chapter 12 - Think and Explain: 64

Answer

Kindling is in smaller pieces, meaning it has greater surface area per kg than large logs. More of its mass is near the surface, closer to the heat source and to oxygen, so more of the material heats up more quickly to the point where it catches fire.

Work Step by Step

This is discussed on page 238.
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