Enter the exciting world of science and uncover some of its mysteries. Each **Science Secrets** title holds the answers to interesting questions about a top science topic. Hands-on experiments with simple steps and clear illustrations allow you to test key ideas for yourself. In *Secrets of Heat and Cold,* you will find out how heat is measured, what happens at absolute zero, and how refrigerators work. Along the way, you will learn some amazing facts about the Sun's heat, polar animals, and how computers stay cool. Are you ready to unlock some **Science Secrets? **—Blurb