SCIENCE
Morgan, Sally

Earth's Energy Sources

(4) 4-6 Earth Cycles series. These volumes examine some of Earth's natural resources (water, rocks) and processes in nature (seasons, energy source creation) in terms of interconnected cycles. The very basic main texts are supplemented with captioned photographs and somewhat random "Q and A" sidebars. The information is very selective, but the volumes could make for decent introductions to the subjects. Reading list, websites. Glos., ind. Review covers these Earth Cycles titles: Earth's Energy Sources, Earth's Water Cycle, Rocks, and Seasons.

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