How's the weather on the Moon? There is no weather! Discover more true and surprising facts about the moon. Includes a map of the moon's cool paces, time lines, drawings, photos--and a peek at an as
Describes Pluto compared to the planets previously known; explains how similar objects in space beyond Pluto made scientists decide to reclassify it as a dwarf planet; and discusses its moons and spac
Examines the formation and eruption of volcanoes, describes the damages and benefits of volcanoes, and discusses steps taken to predict eruptions and protect the surroundings.
Describes the role of the sense of touch in human life; the parts played by the skin, nerves and brain in feeling; pain and other reactions to touch; technological developments affecting touch; and th
Recounts the origins of the desire for independence in the colonies that would become the United States, the events that led to open rebellion, and how the Continental Congress adopted the Declaratio
Discusses why immigrants came to the United States in the late 19th and early 20th centuries, the difficulties of the journey, the establishment of the Ellis Island Immigration Station and what went o
