02261cam a2200373 i 4500 532107962 TxAuBib 031114s2004||||||||||||||||||||||||eng|u 2003025202 9781402709005 1402709005 (OCoLC)53483550 DLC eng DLC QBX UKM BAKER BTCTA OCLCG CVA IG# OCLCQ OCLCF OCLCQ OCLCO OCLCQ TxAuBib rda Levine, Shar, 1953- Mighty machines / by Shar Levine and Leslie Johnstone ; illustrated by Steve Harpster. New York, NY : Sterling Pub., 2004. 48 pages : color illustrations ; 21 cm. txt rdacontent n rdamedia nc rdacarrier First science experiments (Sterling Publishing) First science experiments Note to parents and teachers -- Be safe -- Introduction -- Force fields -- How can I weigh really small things? -- Simple machines -- Levers -- How do different levers work? -- Can I use parts of my body as levers? -- Pulleys -- How can I lift up something really heavy? -- Can I lift a weight with a pulley that moves? -- Wheels and axles -- Why cant you use just a wheel? -- Why cant I put in a screw with my fingers? -- Inclined planes -- How did they build tall buildings before they had cranes? -- Why are some ramps really long and others really short? -- Wedges -- How do wedges work? -- Screws -- How do the ridges on screws work? -- What would you get if you unraveled a screw? Give kids a head start on science with simple experiments and activities that have been designed specifically for young scientists and require only minimal adult supervision. Simple machines Juvenile literature. Simple machines. Juvenile works. Johnstone, Leslie. Harpster, Steve. First science experiments (Sterling Publishing.) First science experiments. https://catdir.loc.gov/catdir/toc/ecip0411/2003025202.html Table of contents https://catdir.loc.gov/catdir/description/ste041/2003025202.html Publisher description