Gr 4–7—While geologic resources may not be the first topic to spring to tween minds when considering exciting sciences, the extraction, refining, and uses of minerals and fossil fuels is made quite interesting in these volumes. Each book addresses a specific topic and enlivens it with charts, diagrams, and surprising facts. A few of the volumes mention that certain elements actually predated the formation of the earth, and others warn of the dangers of abandoned mines. The chemical and geologic processes that form the resources and those that humanity uses to process them are well explained and illustrated, enabling readers to grasp fairly difficult concepts. Each volume concludes with a "You Decide" section, laying out concerns regarding the topic.
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