Is it easier to move ice with a lever or a screw? Readers will see how a group of kids compares two simple machines and decides which one does a better job at moving the ice. This book supports engineering design standards for primary grades in the Next Generation Science Standards.
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语言 英语 ● 格式 PDF ● ISBN 9781467783019 ● 出版者 Lerner Publishing Group ● 发布时间 2015 ● 下载 3 时 ● 货币 EUR ● ID 5034070 ● 复制保护 Adobe DRM
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