Show I WHY A STONE SIPI SINKS i AND A ND WHY ti WOOD ti FLOATS LO I 1 r C Copyright 1915 by y the Press Publishing Co Col 1 Specific gravity Is tho the pull pun that the earth exerts on everything it ft I It Is what keeps us down to earth it Il itIc 1 1 I. I Ic Ie 1 t T lann Inn on nn t t fn nd lo 1 J V 0 t ground round or a stone when you throw It IL ILAnd I And specific gravity sra Is the tho thing that c causes some somo objects to float floit and others to sink In water A stick weighs welshs less lessin lessin in proportion to Its si e than the same quantity of water Therefore the tho earth f 1 exerts more of a a pull on the water than J it docs does on the stick sUck The result Is Js that tho stick floats A stone weighs weIgh a a. j good deal more than the same quantity 1 o of or water ater Therefore the stone sinks j Cold air nil Is 19 denser or heavier heaver 1 than warm air all That is the tho reason wh why theair tho the f fair air is cooler near the floor than It Is at atthe atthe the ceiling Tho The warm air on the cold air At ono one time It w r s believed that tint only i wooden boats would float Men lell worked until the they found that b by making an 1 iron boat of i rf e. e certain s size I io and shape they ther could easily make it float because It contained so much air ait and air i I. I light As Aa an empty empt boat t Is Js loaded with sinks I freight ht or passengers It slowly nearer and nearer the surface of or the water A man named fought J. J I for years to have a line painted around all ships with the understanding ln that the ship was not to be loaded so below the i Iv Iy as to make mako that line sink surface of the water All ships ha hait have haveIt It Jt now Just look at some next neat t time m It Is you vou go across in the ferry fern line or the n nark mark |