La batalla de los árboles

Examines the nature of inclined planes and wedges, how they can reduce the amount of force necessary to perform work, and ways in which they are used.

Presented in a large-size picture book format, this is the story of the Mars Rover Curiosity. It explains how it was built at the Jet Propulsion Laboratory in California, how it got its name, how it got to Mars, and what its mission hoped to accomplish. A timeline about the history of Mars exploration is provided at the end.

La vida de Biddy Mason comenzó como una persona esclavizada, pero se convirtió en una exitosa enfermera, partera y propietaria de tierras. Dejó un legado de caridad y caridad e influyó en la historia de Los Ángeles. Esta biografía en español desarrolla la comprensión lectora y la alfabetización en estudios sociales. Con un diseño visualmente atractivo, este libro presenta texto cautivador, datos divertidos, barras laterales y líneas de tiempo que ayudan a los estudiantes a comprender los conceptos esenciales que necesitan saber en su nivel de grado. Repletos de información y...

A lot of what many people know about the native groups in the northeastern part of North America comes from colonial history. The Wampanoag met the Puritans as they made their home at Plymouth. The Powhatan group of the Algonquin people had a large role in the history of the Jamestown Settlement in Virginia. However, the history of the native groups living in modern New York, Massachusetts, Ohio, Pennsylvania, Maine, and northern Virginia began long before European settlement! Readers meet several individual groups of native peoples and explore the distinguishing features of northeastern...