La gente de la luna

With life-like illustrations and simple text, books in this series introduce children to different dinosaurs and the unique characteristics. Children learn the features of each dinosaur, what they ate, and whether they were predator or prey to other dinosaurs. The books also introduce fossils and how they play a role in our knowledge of dinosaurs' existence.

An introduction to ostriches, including their size, diet, and everyday behavior and highlighting differences between those in the wild and those living in zoos.

Introduce children to ways that the Earth's surface is constantly changing. This Spanish book teaches readers about earthquakes, volcanoes, weathering, and erosion. Featuring stunning images and fascinating facts, children will also learn about famous landforms like the Canadian Rocky Mountains, Angel Falls, Mount Fuji, and Columbia River Gorge. With a glossary, index, and engaging lab activity, readers will be encouraged to further explore the science behind landforms!

Libro para adquirir el fundamento de los mecanismos teórico-prácticos de los equilibrios químicos que tienen lugar en disoluciones acuosas. Se inicia con una presentación de los compuestos químicos, de las reacciones químicas y las ecuaciones químicas con los conceptos estequiométricos necesarios para exponer la disociación electrolítica, sus consecuencias y las diversas formas químicas de cuantificar los compuestos en estado puro y en disolución, teniendo en cuenta su disociación y con la utilización de cifras significativas, explicando una estadística básica para la...