It can be surprising which objects float and which don't. An apple floats, but a ball of aluminum foil does not. If that same ball of foil is shaped into a boat, it floats! Why? And how is it possible that a huge ship made of steel can float? Answering these questions about density and flotation is David A. Adler's clear, concise text, paired with Anna Raff's delightful illustrations. Activities that demonstrate the properties of flotation are included.

Introduces the concepts of floating and sinking by following a fictional captain on the high seas who wonders why his boat floats and his treasure sinks.

Audisee® eBooks with Audio combine professional narration and text highlighting for an engaging read aloud experience! A rock sinks in the water. A hot air balloon floats in the air. Many objects float and sink. But what makes them move this way? And how do people use floating and sinking in their lives? Read this book to find out! Learn all about matter, energy, and forces in the Exploring Physical Science series—part of the Lightning Bolt BooksTM collection. With high-energy designs, exciting photos, and fun text, Lightning Bolt BooksTM bring nonfiction topics to life!

Readers will be encouraged to actively test items to see if they sink or float.

"Profoundly moving . . . Will take your breath away." —Kathleen Glasgow, author of Girl in Pieces "Give this to all your friends immediately . . . It tackles mental health, depression, sexual identity, and anxiety with beauty and empathy." —Cosmopolitan.com A Kirkus Reviews Best Book of the Year A Chicago Public Library Best of the Best of the Year Biz knows how to float, right there on the surface—normal okay regular fine. She has her friends, her mom, the twins. She has Grace. And she has her dad, who shouldn't be here but is. So Biz doesn't tell anyone anything—not about her dark, runaway thoughts, not about kissing Grace or noticing Jasper, the new boy. And not about seeing her dad. Because her dad died when she was seven. But after what happens on the beach, the tethers that hold Biz steady come undone. Her dad disappears and, with him, all comfort. It might be easier, better, sweeter to float all the way away? Or maybe stay a little longer, find her father, bring him back to her. Or maybe—maybe maybe maybe—there's a third way Biz just can't see yet. Debut author Helena Fox tells a story about love, grief, and inter-generational mental illness, exploring the hard and beautiful places loss can take us, and honoring those who hold us tightly when the current wants to tug us out to sea. "I haven't been so dazzled by a YA in ages." —Jandy Nelson, author of I'll Give You the Sun (via SLJ) "Mesmerizing and timely." —Bustle "Nothing short of exquisite." —PopSugar "Immensely satisfying" —Girls' Life * "Lyrical and profoundly affecting." —Kirkus (starred review) * "Masterful...Just beautiful." —Booklist (starred review) * "Intimate...Unexpected." —PW (starred review) * "Fox writes with superb understanding and tenderness." —BCCB (starred review) * "Frank [and] beautifully crafted." —BookPage (starred review) "Deeply moving...A story of hope." —Common Sense Media "This book will explode you into atoms." —Margo Lanagan, author of Tender Morsels "Helena Fox's novel delivers. Read it." —Cath Crowley, author of Words in Deep Blue "This is not a book; it is a work of art." —Kerry Kletter, author of The First Time She Drowned "Perfect...Readers will be deeply moved." —Books+Publishing

While trying to cross a moat, Archimedes the Goat and Skinny the Hen learn why objects sink or float.

Outlines the steps for creating 20 safe homemade projects that demonstrate key engineering and mechanical principles, from a pyrotechnic rocket made from an empty juice carton to a light-sensitive robot mouse that follows a flashlight path.