Be green. It is important to keep Earth’s air clean. Using the scientific method, readers perform hands-on experiments that explain the properties of air, how to conserve energy while heating and cooling air, and how to reduce air pollution. Readers who are interested in science fairs will find many ideas for science fair projects.
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语言 英语 ● 格式 PDF ● 网页 112 ● ISBN 9780766056626 ● 出版者 Enslow Publishing, LLC ● 发布时间 2011 ● 下载 3 时 ● 货币 EUR ● ID 8663509 ● 复制保护 Adobe DRM
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