Everything you can touch and hold is made up of matter - including you, your dog, and this book! Matter is stuff that you can weigh and that takes up space, which means pretty much everything in the world is made of matter!

"Follows Dorothy Vaughan's path from math teacher to "human computer" as well as her success as first African American supervisor at her company." --

When you feel like running, leaping, and singing, people might say you have a lot of energy. And you're not the only one! Energy is the stuff that makes everything live and move. People, animals, plants - we all need energy to live!

"Have you ever seen a ramp at a school or library? That's an inclined plane! Learn how inclined planes are flat, sloping surfaces that make it easier to move heavy things from lower ground to higher ground instead of lifting them"--

"Some days Mama is bright like the yellow part of a rainbow. Other days, Mama is flat like the scratched surface of our kitchen table. . . . A girl tells about a misunderstood dragon as a way to understand her mother's unpredictable emotions and reveal her love for her"--

This book introduces young readers to screws and how we use them everyday.

"A lever is one of six simple machines that are designed to make different kinds of work easier. Lifting, pulling, pushing--all these tasks are more efficient when you use a simple machine. In Levers Lessen the Load: Simple Machines for Kids, readers learn how levers and fulcrums can help us move far more weight than we can on our own. Need to lift a heavy rock? Use a lever! Need to push a log out of the way? Use a lever! Know where else you can find...