Los huesos de Descartes

¿Sabías que la gente puede excavar y utilizar el calor de la Tierra para producir energía? Esta energía geotérmica puede alimentar tu computadora y calentar o enfriar tu hogar. Pero, ¿cómo se obtiene exactamente? ¿Y cuál es el impacto sobre el medioambiente? Lee este libro para aprender todo sobre la energía geotérmica. Did you know people can dig underground and use Earth's heat to make energy? This geothermal energy can power your computer and heat or cool your home. How exactly do we get it, though? And what is the impact on our environment? Read this book to find out all about...

Introduce students to capital resources and how they work as part of our economy. This Spanish-translated text will teach young readers about the economy, while building their literacy skills and social studies content knowledge. Simple informational text features help students navigate the text, while primary source documents and images keep students engaged.

What are aircraft? -- What do aircraft look like? -- What are aircraft made of? -- How did aircraft look long ago? -- What is an airplane? -- What is a jet? -- What is a helicopter? -- What is a glider? -- Quiz -- Picture glossary.

Más de 150 fotos de animalitos acompañadas de textos sencillos que te descubrirán todos los misterios de la vida silvestre.