From: esquel@sommarskog.se   
      
   Mark Brader (msb@vex.net) writes:   
   > * Game 10, Round 7 - Science - How the Earth Was Made   
   >   
   > This round is based on the BBC documentary series "How The Earth   
   > Was Made".   
   >   
   > 5. Within 300,000,000 years, how old did  finally   
   >    determine the Earth is?   
      
   4.5E9 years   
      
   > 6. Time on this scale is so long and hard to comprehend, scientists   
   >    refer to it by what term?   
      
   Eon   
      
   > 7. For over 1,000,000,000 years, much of the oxygen produced by the   
   >    stromatolites went to oxidizing this substance in the   
   >    primordial oceans, turning our early seas from green to blue.   
   >    The quantities of the resulting compound were so huge that   
   >    bands of sediment are found throughout the world, and are the   
   >    major source of this substance globally.  What is this element?   
      
   Calcium   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)