Have you ever wondered WHY things around you look and act the way they do? The world around us is made up of particles we call matter. Science can help us better understand what matter is and how it works. Learn facts about different states of matter, how they act, and how they can sometimes change in this simple yet informative introduction to nonfiction.Readers will learn the answers behind: - Why do we call some things matter? - Why do we call some things solid, liquid, or gas?- Why do solids stay still?- Why do liquids slip and slide? - Why do gases get to go wherever they want? - Why do some things get to be many different states of matter? About the Why Do series: Introduce early learners to nonfiction with this layered series full of fun and learning. Each book explores a STEM topic by answering questions kids want to know! The whimsical pages of these books feature the why do questions and silly answers and illustrations before revealing the true answers. Vocabulary words and simple activities are scattered throughout to add to the fun.