تفاصيل الكتاب
تنسيق
غلاف صلب
صفحات
32
لغة
الإنجليزية
منشور
Sep 1, 2015
الناشر
Crabtree Classics
رقم ISBN-10
0778718905
رقم ISBN-13
9780778718901
الوصف
Leo teaches his cat Pallas all about simple machines by applying his knowledge of science to their stone age world. Engaging illustrations and stories provide a fun introduction to science concepts, including wheel and axles, levers, pulleys, wedges, screws, and more. Information boxes accompany each story to explore real applications of simple machines in the natural and designed world.
الأنواع
علم وتكنولوجيا