Mía y el león blanco

When rocks change because of environmental conditions, the new rocks are called metamorphic rocks. A rock's chemical or physical makeup may change because of conditions such as temperature, stress, or pressure. Your readers will learn fascinating facts including where metamorphic rocks are most commonly found, the different types of metamorphism, and how metamorphic rocks are identified. Full-color photographs depict these rocks in nature. A helpful graphic organizer shows how these fascinating rocks form.

Tony Wolf era el agente más brillante de la historia del FBI, hasta que un día desapareció del mapa y no se volvió a saber de él. ¿Abandonó el servicio activo o fue descubierto y asesinado? De repente un día sale del anonimato cuando rescata a dos niños secuestrados y se desata el caos. La banda de criminales en la que se había infiltrado antes de desaparecer se lanza en su búsqueda, así como la propia FBI, que tiene muchas preguntas que hacerle. Pero Tony está cansado de ser la presa. Tanto la banda de moteros como los agentes del FBI que se han desplazado al pequeño pueblo del ...

A young boy travels to China to learn about the people and culture of one of the world's most powerful nations.

From art and architecture to politics, philosophy, and mathematics, "western civilization" owes a great deal to the achievements of ancient Greece, but what do we really know about this long-gone civilization? How did geography influence the politics of the Greek city-states? What's the difference between an agora and an acropolis? This book takes readers several thousand years into the past, when independent city-states ruled the Mediterranean Sea, to find the answers. Full-color photographs and maps, accompanied by accessible text, introduce readers to the many contributions the ancient...