TECHNOLOGY
Olien, Rebecca

Cleaning Water

(4) K-3 First Facts: Water in Our World series. Some basic concepts regarding how water we use is purified and how it gets to our faucets and drinking fountains are superficially explained in simple, large-print sentences illustrated with photos and diagrams; fact boxes provide deeper information on some pages. Water conservation is urged toward book's end, and an easy experiment and critical thinking questions are also provided. Reading list. Glos., ind.

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