Simple machines

inventions that changed the world-- and the science behind them

"Leo teaches his cat Pallas all about simple machines by applying his knowledge of science to their stone age world. This fun introduction to science concepts explains 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."--Provided by publisher.

Crabtree Pub. Co.
2016
9780778719175
book
Lexile: 
830

Holdings

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108763147781622296456532633046EIDE159EIDE058751621.8 LAW621.815802161721736518457
213596656970632235456532633046HIVE259HIVE804228621.8 LAW621.815825759371709307855