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.
發表於2024-11-13
Pulleys and Gears 2024 pdf epub mobi 電子書 下載
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Pulleys and Gears 2024 pdf epub mobi 電子書 下載