Introduction to JavaScript Object Notation

Explore the ups and downs of gravity in this introduction to physical science by a trusted nonfiction team. What happens to a ball when it rolls off a table? It falls to the floor. Why doesn't the ball keep rolling straight ahead or fly up off the table? The answer is gravity. From density to inertia to free fall, David A. Adler skillfully explains how this invisible, but all too real force operates and what it means for our daily lives. Notable science experiments by Sir Isaac Newton and astronaut David R. Scott are covered. Also included are activities for kids to test at home and in the classroom. Anna Raff's bright and humorous artwork helps breakdown the concepts in a kid-friendly way. Vetted by a physicist, this fact-filled primer includes a glossary.

Think metric! A fun illustrated primer on the internationally recognized metric system for kids. Used in almost every country in the world, the metric system is an easy-to-use way of calculating length, distance, weight, and volume. Look at the label of a soft drink. You'll see both ounces and milliliters or gallons and liters listed. For kids who love to interact with their environment and measure and build things, knowledge of the metric system is a must. Filled with do-it-yourself activities, bright illustrations, and valuable kid-friendly information on how to convert inches into centimeters, pounds into kilograms, and much more, this latest from trusted STEM creators David A. Adler and Edward Miller will have kids thinking in metric in no time. Each book includes a ruler with metric and imperial measurements that can be cut out from the jacket flaps. David A. Adler and Edward Miller have collaborated on over 10 math books for children, many of which have received praise from educa