Cómo podemos utilizar la palanca?

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

The Uses Of Wind Energy Is The Topic Of This Book. Explains The Positive And Negative Impact This Form Of Energy Can Have On Our World.

Follows the life and career of the French scientist who proved the existence of germs and their connection with diseases.

When we look up at the night sky you can see millions of stars, but what do you think we could see in space if we left Earth? If we could hop into a special ship and blast off, traveling billions of miles away from Earth, we’d see the Milky Way galaxy. In this book, readers take an incredible journey through that galaxy, exploring the universe and learning how it was formed and what will one day happen to these enormous groups of stars. From mysterious dark matter to the black holes at the center of galaxies, readers will also dive into the mysteries of the universe scientists have spent...

Introducción biográfica y crítica. 1. Gabriel Celaya: hombre de un tiempo. 2. Gabriel Celaya: poeta en el tiempo. Noticia Bibliográfica. Bibliografía Selecta. Abreviaturas Utilizadas. Nota Previa. Trayectoria Poética. Antología. Índice de Primeros Versos. Índice de Poemas. Índice de Láminas.

The use of calendars dates back thousands of years. Why are we driven to record time, and what would happen if we did not? Who created the concept of calendars? Why do different cultures use different calendar systems? And why are calendars so important to us? It is about "time" we found out! Created in collaboration with the Smithsonian Institution, this Spanish-translated Smithsonian Informational Text builds reading skills while engaging students' curiosity about STEAM topics through real-world examples. Packed with factoids and informative sidebars, it features a hands-on STEAM challenge...

Soy grande? ¿Soy pequeño? ¿Siempre soy el mismo? No es tan fácil saberlo, pues hay dilemas en la vida que a veces ofrecen información contradictoria. En Yo se exploran situaciones cotidianas de los niños en edad preescolar, con el fin de guiarlos en su descubrimiento de sí mismos y de su realidad, a partir de su entorno, sus emociones, necesidades y límites.