Energía del viento

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

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.

Las plantas viven en distintas zonas climáticas y, a través de millones de años, han ido generando estrategias para adaptarse al medio que las rodea. En este libro te enseñamos a observarlas y entender que en el mundo de las plantas cada detalle está ahí por alguna razón. ¡Todo por sobrevivir!

Gira las ruedas, abre las ventanas y despliega las solapas para averiguar muchas cosas sobre los huertos y el cultivo de los alimentos.

A 2014 survey by the Substance Abuse and Mental Health Services Administration showed that 8.7 million youths ages twelve to twenty reported drinking alcohol beyond “just a few sips” in the previous month. Those who start drinking before age fifteen are five times more likely to become dependent on alcohol than those who begin at twenty-one. This resource shows young people how to help a friend who is abusing alcohol. It arms them with facts about alcohol, how it affects the teen mind and body, how to look for signs of a problem, and how to bring others on board to help.

Presents a variety of information on snakes, including the reproduction, the predators of the snake, and other behaviors of the snake.