Photographs and text describe how math was used to solve problems relating to the Hoover Dam including how much concrete and other building materials were needed and the environmental issues that arose as a result of the dam.
Examines the history of plutonium, and discusses its properties, how it is produced, and also describes plutonium compounds and their uses; and looks at its relationship to the other elements in the periodic table.
Examines the history of arsenic, and discusses its properties, how it is produced, and also describes arsenic compounds and their uses; and looks at its relationship to the other elements in the periodic table.
Examines the lives and accomplishments of the members of Outkast--Antwan Patton and Andr? Benjamin--discussing their childhoods, collaboration, big break in the hip-hop industry, music, side projects, and more.
Presents a collection of stories about people surviving earthquakes, including quakes in the Kashmir region in 2005, San Francisco in 1906, the Kanto Plain in 1923, and Tangshan in 1976. Includes glossary and list of resources.
Photographs and text describe how to understand and use variables while learning about some famous early flights including the Wright Brothers, Charles Lindbergh, and Amelia Earhart.
A study of potassium that discusses its properties, where it is found, its relationship to other elements, and how it is used. Includes a glossary and list of resources.
A study of calcium that discusses its properties, where it is found, its relationship to other elements, and how it is used. Includes a glossary and list of resources.
