Microwave ovens

"Did you know the microwave oven was actually invented by mistake? That mistake led to the technology that has made cooking faster, more convenient, and more popular than conventional cooking. This book addresses the differences between a standard oven and a microwave oven. So, pop in a snack, set the timer, and in a few seconds you'll be ready to enjoy! This book will allow students to plan and conduct an investigation to determine the effect of placing objects made with different materials in the path of a beam of light"--Back cover.