发表于2024-12-26
Pulleys and Gears 2024 pdf epub mobi 电子书
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In this exciting series, students will learn how simple machines such as levers, springs, and wheels power more complex machines that we use every day. Each title contains a project that allows the reader to make a machine using simple machines and household items. The text is reinforced with colorful photos, clearly-labeled diagrams, real-life examples, and easy experiments that allow students to observe the scientific concepts behind the machines.
Pulleys and Gears 2024 pdf epub mobi 电子书