Lobachevski

Introduce students to immigration in America in the 1800s, and how it affected the United States. With this Spanish-translated book, readers will discover topics such as Ellis Island, Angel Island, and assimilation. Primary source images, fascinating facts, a glossary, and other features keep students engaged and help them better understand the social studies content.

As a land that’s constantly in flux, Earth sometimes reveals clues about the plants, animals, and other organisms that lived long ago. Fossils teach us much about what life was like millions of years ago, answering the questions of how Earth changed and maybe even why it changed. This essential Earth science topic is thoroughly explained through manageable text, fact boxes, informational charts and diagrams, and a glossary and index. Readers will become young Earth detectives by the time they’re through with this text!

Beginning readers explore the steps to make plants grow! Readers will learn about various parts of the plant including seeds, roots, and leaves in this engaging, Spanish-translated nonfiction title. Featuring vivid, clear photos and simple, informational text, even the most reluctant reader will be captivated!

Técnico electricista 4 - Curso visual y práctico Corriente alterna En esta clase nos encargaremos de profundizar en la generación de corriente alterna y conoceremos los valores típicos de este tipo de corriente. Además, revisaremos las inductancias, los capacitores y la aplicación de la corriente alterna en estos componentes.Para terminar, veremos los efectos propios de la corriente alterna, y caracterizaremos la resonancia y los armónicos.