"What keeps us stuck on the ground? What makes magnets come together? What makes one team win during a game of tug of war? Forces!" --

"Earth is our home, but do we really know about this planet? Quite a lot! We know how the Earth came to be the planet we live on, how oxygen made it possible for life to develop, and how the climate is changing in ways that affect everyone and everything. In The Earth: One-of-a-Kind Planet, the narrator, who just happens to be the Universe, explains where Earth is located in the solar system, how life evolved on Earth, and more. Universe uses a friendly,...

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!

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!

This book introduces early readers to pulleys and how we use them everyday​.

This book introduces early readers to wedges and how we use them everyday​.

A survey of the four types of carnivorous plants--sticky surface, pitcher plants, snare traps, and suction traps--describing howthey ensnare and digest live animals.