Explains what meteorology is, shows the impact of the weather on human history, and looks at origins of weather phenomena, the role of the water cycle on weather, and the work that meterologists do.
Explains what hydrology is, shows the impact of water on human history, and looks at water's role in climate, the water cycle, and the role of hydrology in the contemporary world.
Describes the legislative branch of the United States government, and discusses each of its two parts, how it works, its origins, and notable events in its history, including impeachments and declarat
Discusses the meaning and purpose of a constitution; recounts reasons why the United States needed one in the 1780s and the events of the Constitutional Convention; and describes the Constitution's ma
