Los sólidos (Solids)

Learn the secrets to artful cupcakes, oven-fresh bread, and other delicious baked goods in this delightful nonfiction title. Readers will learn how mathematics helps bakers measure their ingredients to make tasteful treats. Featuring vibrant images and charts, informative text, and fun, intriguing facts, this Spanish-translated nonfiction book will leave children fascinated by all the details that go into baking their favorite treats--like doughnuts and cookies!

Readers may never expect that they might free fall to Earth, but if they have ever dived into a pool, that's exactly what they've done. This book shows readers how Newton's three laws of motion affect divers, skydivers, and mountain climbers' movements. Readers discover who uses gravity, and who works against it, and all other forces that contribute to a successful dive or climb. After reading this book, readers can decide if they will ever be interested in engaging in one of these extreme sports.

Readers won't have to disassemble their favorite toys to discover what makes them work. This book explores electric, magnetic, and motion-powered toys from design to function. It introduces readers to the six simple machines and explains how they use force and motion to do work. Not every toy is a technological marvel. Readers learn about time-honored favorites including the rocking horse, Slinky, and rattles.

The need for speed is the motivating factor in this engaging, Spanish book. Readers learn the history of travel from the very slow to the supersonic and beyond, including everything in between. They learn and discover the factors that influence motion for all types of vehicles: land, air, and water alike. They also learn different ways to measure speed and read about energy uses for different vehicles. With greater speed comes greater risk. Readers learn how engineers are always seeking new and better ways to keep people safe as they travel faster and go farther.

La pandemia de marzo de 2020 detuvo abruptamente el mundo. Los trabajadores de primera línea arriesgaron sus vidas para brindar servicios esenciales, mientras que la enfermedad del coronavirus 2019 (COVID-19) devastó familias, escuelas e industrias. ¿Cómo mejoraron las cosas? Esta narración en verso da una visión aleccionadora de ese momento doloroso de la historia.

Uno de los retos del siglo XXI es alcanzar la plena igualdad de derechos entre hombres y mujeres. Cien años después de que se celebrara por primera vez el Día Internacional de la Mujer, el 19 de marzo de 1911, te invitamos a conocer en las páginas de este libro a un grupo de mujeres que, en épocas en las que no tenían derecho a casi nada, se atrevieron a luchar por sus sueños, y llegaron, incluso, a cambiar la historia.

Arvid Falk, un joven idealista y generoso, deja su empleo para dedicarse a la literatura militante. Al cabo de muchas experiencias amargas, vuelve a su vida de empleado y, ya sin ilusiones, dedica sus horas libres a la numismática. A la figura de Arvid se contrapone la de su hermano, Carl Nicolaus, mezquino e hipócrita aunque con un fondo de humanidad verdadera. Una serie extraordinariamente incisiva de retratos de personajes y ambientes de la sociedad sueca de finales del siglo XIX completan el impresionante edificio narrativo de la novela: figuras de la vida bohemia, periodistas sin...

Before there was the U.S. Constitution, there were the Articles of Confederation. Readers discover the story behind the first written constitution of the United States—from the factors that inspired its creation to the reasons why it was replaced. The detailed main text is enhanced by informative sidebars and graphic organizers. Historical images, including relevant primary sources, allow readers to immerse themselves in this historical period. Readers are given the chance to thoroughly examine elements of the original document, making them feel like true historians. They’re sure to enjoy ...