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Provides The History Of Biofuels, Different Uses, Positive And Negative Characteristics, And How They Will Impact The Future.

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 Thirteenth Amendment That Freed The Slaves, The End Of The War, And The Death Of President Abraham Lincoln.

Un libro lleno de humor para descubrir los misterios más fascinantes y mejor guardados del UNIVERSO. Desde la existencia del propio mundo los avances y descubrimientos científicos han sido el motor del progreso de la humanidad. Pero nuestras creencias no han sido siempre las mismas y hoy en día sigue habiendo un montón de dudas que nos asaltan: ¿acaso somos tan especiales como nos creemos?, ¿se puede apagar el Sol? ¿abandonaremos algún día la Tierra?, ¿es posible habitar otros planetas?, ¿hay vida inteligente ahí fuera?, ¿qué es eso de la materia oscura? Un recorrido...

People have been sending mail for a long time. But how they do it has changed a lot! Read about the history of mail as you learn to collect data. This Spanish math book combines math and reading skills and uses real-life examples of problem solving to teach subject-area content. The dynamic images, detailed sidebars, practice problems, and math diagrams make learning data measurement easy and fun. Text features include a table of contents, a glossary, an index, and captions to build vocabulary and increase understanding of math and reading concepts. An in-depth problem-solving section...

Plymouth Rock chickens and Silkie chickens are just a couple of the many breeds of chickens living on farms. Readers will learn how farmers raise chickens and what different breeds are called. This high-interest book combines eye-catching photographs with manageable text to best reach its readers. Readers will love learning chicken fun facts, while gaining an understanding of why chickens are farmyard staples. Text is supported by a variety of tools, including a picture glossary, table of contents, index, and additional websites.

¿Cuál es tu día favorito de la semana? En ¡Viva! ¡Es sábado!/Hooray! It’s Saturday!, algo importante pasa cada día. ¡Pero el sábado, esta familia se divierte! (What is your favorite day of the week? In ¡Viva! ¡Es sábado!, something important happens each day!) Young learners learn the days of the week as they go to the park, attend school, have piano lessons, play basketball and more! From Sunday to Saturday, young readers will learn all of the days of the week in this delightfully-illustrated book. Learn simple English words and phrases with the corresponding version Hooray!...