Simple Machines 在线电子书 图书标签:
发表于2024-11-29
Simple Machines 在线电子书 pdf 下载 txt下载 epub 下载 mobi 下载 2024
Thirteen experiments about the six simple machines -- the lever, wheel and axle, pulley, inclined plane, wedge and screw -- teach kids about basic science. Full-color photographs and step-by-step instructions clearly explain each activity, so that kids can make the most of the machines with minimal help from adults.Part of the Starting with Science series, "Simple Machines" encourages children to have fun as they learn basic science and fills a need for primary-level science resources.
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Simple Machines 在线电子书 pdf 下载 txt下载 epub 下载 mobi 下载 2024