Cómo podemos utilizar la polea?

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.

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.

Pon a prueba tus neuronas con 365 enigmas y juegos de lógica, uno para cada día del año. ¿Te gustan los desafíos? ¿Eres el rey de los enigmas? Abre este libro y prepárate para exprimir tu cerebro con 365 divertidos y estimulantes juegos de ingenio. De la mano del matemático Miquel Capó, descubrirás los mejores acertijos, paradojas, ilusiones ópticas y problemas matemáticos. ¡El entretenimiento está asegurado!

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...

Simple text and photographs describe dragonflies, including their physical characteristics, behavior, and life cycle.

Learn about outer space exploration, from the Hubble telescope to the latest space shuttle launches, in this delightful, Spanish-translated nonfiction title! Readers will learn about famous astronauts, the history of exploring space, and what the future holds for space exploration through vivid images and photographs, informative text, and intriguing facts. With a glossary and index, readers will want to learn all they can about exploring space! This 6-Pack includes six copies of this title and a lesson plan.