Atlas visual de los dinosaurios

With simple examples that are easy to relate to, this basic review of some of the building blocks of economics will help readers easily grasp the concepts. With language that is conversational without being too casual, readers are engaged throughout as they learn about not only these basic concepts but how they fit into the whole economic scheme of things, such as where goods come from. Readers will learn about the three factors of production, as well as what happens when resources are lacking and how that influences the entire economy.

¿Qué es el ciclo de vida de un koala? ¿Cómo se llaman los bebés koalas? Los jóvenes lectores descubrirán estos y más datos en Los koalas, uno de los libros de Los niños y la ciencia: Los ciclos de vida. What is the life cycle of a koala? What is a baby koala called? Young readers will discover these facts and more in Koalas, a Science Kids: Life Cycles book.

Farmers use tractors to plow their fields. Tractors are also used on construction sites. The biggest tractors are as wide as a road. Learn more about these machines in Tractors, an AV2 media enhanced book

Encuentra las respuestas a 70 preguntas sobre el espacio. �En qu� se diferencian los planetas de las estrellas? �Por qu� no sentimos que la Tierra se mueve? �Qu� origina las estaciones en la Tierra? �Hay vida en otras partes del universo? Puedes convertirte en un experto del espacio y sorprender a tu familia y a tus amigos con datos fascinantes. Cientos de datos e ilustraciones impresionantes que describen la belleza de nuestro universo con detalles espectaculares.