Variables

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=90 BGCOLOR="#006699" TEXT="#080000" bgproperties="fixed" background="02c285a1erlcgo.png"> <div> <FONT SIZE="5" COLOR="#FFCC66" FACE="Arial" ><B>Mr. Manning's Life Science Class</B></FONT><B>     |     </B><A HREF="index.htm" TARGET="_top" TITLE="Mr. Mannings Life Science Class"><U><B>home</B></U></A></div> <div> <A HREF="id61.htm" TARGET="_top" TITLE="Internet Resource Sites"><U>Internet Resource Sites</U></A>   |   <A HREF="id54.htm" TARGET="_top" TITLE="Science Expo Project Notice"><U>Science Expo Project Notice</U></A>   |   <A HREF="id59.htm" TARGET="_top" TITLE="Science Expo Research Paper"><U>Science Expo Research Paper</U></A>   |   <A HREF="id87.htm" TARGET="_top" TITLE="Source Information"><U>Source Information</U></A>   |   <A HREF="id83.htm" TARGET="_top" TITLE="Research Paper Checklist"><U>Research Paper Checklist</U></A>   |   <A 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width="103" height="169">  </B></div> </td> <td valign="top" height=390 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> <I>Variables</I></div> <div> <I><B> <A NAME="variables"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A></B></I><I><B>Variables</B></I></div> <div> <I><B><U>There are three types of variables</U></B></I><B>.</B></div> <bR> <div> <B><U><IMG BORDER="0" SRC="Symb075c00b700dc00000000.png" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Manipulated Variable</U></B></div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700dc00000000.png" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">What you change on purpose in an investigation.</B></div> <bR> <div> <B><U><IMG BORDER="0" SRC="Symb075c00b700dc00000000.png" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Responding Variable</U></B></div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700dc00000000.png" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">The responding variable is what changes by itself because you manipulated (changed) something in your investigation.</B></div> <bR> <div> <B><U><IMG BORDER="0" SRC="Symb075c00b700dc00000000.png" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Variables Held Constant</U></B></div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700dc00000000.png" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Everything else in your investigation must be held constant (kept the same).</B></div> <bR> <div> <I><B><U>Example of Variable</U></B></I><B>:</B></div> <bR> <div> <B><U>Question</U></B><B>:   Do all brands of paper towels absorb the same amount of water?</B></div> <bR> <div> <B><U>Manipulated Variable</U></B><B>:</B></div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700dc00000000.png" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Brands of paper towels</B></div> <bR> <div> <B><U>Responding Variable</U></B><B>:</B></div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700dc00000000.png" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Amount of water that is absorbed by each paper towel</B></div> <bR> <div> <B><U>Variables Held Constant</U></B><B>:   </B></div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700dc00000000.png" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Size of paper towel</B></div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700dc00000000.png" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Amount of water poured on each paper towel</B></div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700dc00000000.png" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Temperature of the water used</B></div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700dc00000000.png" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Container towels are placed in</B></div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700dc00000000.png" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Method of pouring  </B></div> <bR> </td> </tr></table></body>