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La experimentación es la base de la ciencia, esencial para llegar a comprender por qué y cómo pasan las cosas. La propuesta de experimentos de este libro permite iniciarte en el mundo de la experimentación científica en los campos de la electricidad y magnetismo, el aire, la densidad de los cuerpos, fuerzas y presiones, y el calor. Cada experimento se estructura de una forma similar que responde a cuatro preguntas: ¿Qué queremos demostrar? ¿Qué necesitamos? ¿Cómo lo hacemos? ¿Por qué y qué ha pasado?, y requieren de material sencillo y al alcance de todo el mundo. .

How do you truly engage students in learning history? When students make personal connections to the subject, they’re much more motivated to learn. This Spanish book provides firsthand accounts of history that give personal insights into historical events. Students will learn about Alta California by examining the maps, letters, images, photographs, and art that emerged during the Mexican rule of California. With a visually appealing layout, this book features captivating text, fun facts, sidebars, and time lines that help students grasp the essential concepts they need to know at their...

Welcome to the only book that reveals all the secrets of a subject that nobody dares to talk about! How to clean your tail? Why does it smell so bad? Why does it make us laugh just to imagine it?

When people go to sleep, bats are just waking up. While young readers may recognize the image of bats in the night skies, where they live may be less familiar. This title takes readers inside bat roosts to uncover the fascinating facts about this creature. Readers will learn the basics of bat roosts—in caves and beyond—and how they help bats survive in the wild. The text also looks at bat’s appearance, behavior, and the crucial role they play in nature’s ecosystems—topics covered in most elementary science curricula. Diagrams, fact boxes, colorful images encourage learning.