Biogeochemical Cycles

<p>What information on each cycle must I absolutely know for the APES Test? I am taking a late, late alternate test due to an abundance of conflicts (in case you were wondering).</p>

<p>Better yet, could any of you post a link to a good resource for these cycles?
(i.e. sources, sinks, etc.) Thanks!</p>

<p>this site has a lot of good info on them [HippoCampus</a> Environmental Science - Homework Help](<a href=“http://www.hippocampus.org/Environmental%20Science;jsessionid=51B51297A06C70186A436A7D5F9946CF]HippoCampus”>http://www.hippocampus.org/Environmental%20Science;jsessionid=51B51297A06C70186A436A7D5F9946CF)</p>

<p>Awesome resource, thanks dandyandi.</p>