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document.write('<table border="0" cellpadding="0" cellspacing="0" width="300" align=right hspace="10" vspace="10"><tr>');
document.write('<td valign=top align=left colspan=2><img src="images/fun.rings.top.gif"');
document.write('alt="Rings" width="300" height="116" border="0"></td></tr>');
document.write('<tr><td valign=top align=left><img src="images/fun.rings.left.gif"');
document.write('alt="Rings" width="117" height="99" border="0"></td>');
document.write('<td valign=top align=left><a href="" onMouseOver="OnI(\'swy7\');  return true;" onMouseOut="OfI(\'swy7\');"><img ');
document.write('src="images/fun.rings.right.gif" alt="Answer" name="swy7" width="183" height="99" border="0"></a></td>');
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document.write('(<a href="copyright.html#champion">Used by permission of Champion International Corporation</a>)</font>');
document.write('</font></td></tr></table>');
document.write('<br><br><br>');

document.write('When a tree is cut down, we can read its life story. Each spring and summer, a tree adds new layers of wood to its trunk. A light ring for spring and a dark ring for summer show a year\'s growth. Count the dark rings, and you know the tree\'s age.');

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