Mezclas y soluciones (Mixtures and Solutions)

Helps youngsters learn about these colorful figures and their fascinating lives through riddles, question and answer games, and activities. PP.

What’s the difference between a seal and a sea lion? These “second cousins” of the sea look similar, but there are many ways to tell these creatures apart. From ear shape to the noises they make to communicate, seals and sea lions are amazing creatures with both shared features and many truly unique attributes. They both share an ocean habitat, but when readers take a closer look, it’s easy to discover how they each fight off predators, mate, and raise their young in different ways. Captivating full-color photographs help to bring these marvelous mammals to vivid life.

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 primary source book provides firsthand accounts of history that give students personal insights into historical events. Learn about California’s history during the 20th century with this Spanish book that builds reading comprehension and social studies literacy. 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...

La energía es elemento fundamental del mundo contemporáneo, y ha sido la base del desarrollo y dominación del entorno que, nuestra especie, ha venido realizando sobre el entorno y el mundo que nos rodea. Cada nuevo salto en la cultura o en la civilización ha traído aparejado un aumento en la energía (tanto en la producción como en el gasto); por lo tanto, es un componente vital de la sociedad contemporánea. Este libro explora los distintos tipos de energías que existen y se mueve en un amplio abanico porque, entre la energía de los propios músculos y la moderna energía eólica, la ...