Christine Petersen

This title introduces young readers to silver, the most conductive metal on earth! Learn how silver is formed and where it is found. Historic and modern mining methods are detailed. The many uses of silver are examined, from industrial applications in products such as computers and electric switches to medicines and antiseptic clothing! See how artisans such as silversmiths and lapidaries use silver to create beautiful and useful jewelry and wares....

This title introduces young readers to diamonds, the hardest natural substance on Earth! Learn how diamonds are formed and where they are found. Historical and modern mining methods are detailed, and topics such as conflict diamonds are covered. The many uses of diamonds are examined, from industrial applications in products such as diamond saws and dentists' drills to engagement rings and birthstone jewelry. See how artisans such as diamond cutters...

South Dakota is filled with beautiful views, from the Badlands to the Black Hills. It carries with it a sense of history that began with the Paleo-Indians 11,000 years ago. This colorful book takes readers on a journey of the history, culture, economy, and government of South Dakota, from the past to the present. Unique sidebars and timelines support the narrative.

"Groovy Gems" introduces readers to what gems are and how they form, including mineral gems and organic gems. Chapters discuss crystal systems, imitation and synthetic gems, cultured pearls, how gems are used, and their importance throughout history. Sidebars introduce birthstones, precious metals, and conflict diamonds, while a colorful world map indicates where gems are found.

Describes how wind occurs in nature and how it can be used to produce electricity, both now and in the future.

Describes how the sun's energy suppports all living things on Earth and how it is used as a power resource to create electricity.