Energía del viento

Solar Energy Is Explained. Included In This Book Is Where It Comes From, Who Uses It, And The Positive And Negative Benefits Of Using It. Correlated To Common Core, Texas TEKS, Virginia Sols, And Georgia Performance Standards.

This inspiring biographical series ties in with elementary history, science, and social studies curricula, providing teachers with a valuable interdisciplinary resource. With these books, young readers will discover historical figures who devoted their lives to making the world a better place, and changed the course of history. Text copyright 2004 Lectorum Publications, Inc.

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

Este libro es el cuarto de la colección "Mitología para todas las edades" donde presentaremos los hechos y azañas logradas por Aquiles, “el de los pies ligeros”. La colección recupera la tradición del mito griego para acercarlo a los más jóvenes, que les sirva de introducción a este apasionante mundo y que les encienda la curiosidad para profundizar en él.

There is a contest at a school to design a new playground. The students use blocks to build their models. As they build, they use three-dimensional shapes. Some students build a train out of blocks for the younger students to play on. Can you guess which three-dimensional shape they use for the train's wheels? Read to find out which design wins.

Explore the lifecycle of a butterfly and learn about the transformation of caterpillars into beautiful butterflies. The connection to language arts is the rich vocabulary related to butterflies, caterpillars, and their transformations.

An asteroid hitting Earth may sound like science fiction, but it is a real danger. This book explores what the different scenarios might be and how we can prepare ourselves in case such a disaster should occur.