From Axes to Zippers: Simple Machines

From Axes to Zippers: Simple Machines

ISBN: 9781450906371

Precio habitual $9.990
Los gastos de envío se calculan en la pantalla de pagos.

1 en stock
Autor Kathy French 
Tapa Blanda
Dimensiones  1 x 16 x 24
Páginas 24

5 a 8 años

Since ancient times, people have used simple machines—tools for making work easier. Indeed, it would have been impossible for the ancient Egyptians to move millions of stone blocks to build the pyramids without the help of ramps. A ramp is a simple machine. How much do you know about the simple machines you use daily at work and play? Learn about these useful objects in this book.