El cofre de Nadie

The scientific method lists important steps in the process of conducting scientific study and research. With detailed images and fascinating sidebars, this nonfiction book explores the scientific method and scientific practices in depth, and introduces students to new concepts, vocabulary terms, and STEM topics. Aligned to state and national standards, the leveled text supports students reading at above-, below-, and on-grade level. The fun lab activity encourages students to think like scientists. Keep students engaged in learning with this Spanish book.

Los sistemas de las aeronaves han sido un tema poco estudiado en las academias de vuelo. Lo cierto es, que un piloto debe conocer a cada uno de los sistemas de su avión, antes de iniciar sus primeros vuelos. En esta obra, aprenderás todo sobre los sistemas básicos de las principales aeronaves ligeras, o de pequeño porte. Tren de aterrizaje, neumáticos, controles de vuelo, combustible, electricidad, cables y mandos de control, superficies móviles, y todos los principales sistemas que componen el equipamiento de tu aeronave. El aprendizaje de los sistemas del avión debe darse al...

Describes the ancient giant kangaroo of Australia's distant past that was five times the size of today's largest kangaroos. Discusses how the animal lived and how it became extinct.

Introduces the many levels of government leadership in the United States and discusses the presidency, Congress, state and local governments, and the judiciary.