H SDSU Physics 180B
Spring PodCast Debate 2006
H
 
What killed off the dinosaurs? – Based on scientific research – That the cause for dinosaur extinction was an asteroid that collided with earth 65 million years ago.
           
                       
            Across the entire planet, where it hasn't been eroded or destroyed in land movements, there is a thin grey line. In Italy it is 1 cm thick, in America it stretches to three centimetres, but it is all the same thin grey line laid into the rock some 65 million years ago and it bears witness to a cataclysmic event experienced only once in Earth's history. It is called the KT Boundary and geologists believe it is the clue to the death of the dinosaurs and the ultimate reason why mammals and humans inherited the Earth.    
                                     
               
THE KT BOUNDARY		        
         
       
     
           
                               
    Alvarez Hypothesis

In 1980, a team of researchers led by Nobel-prize-winning physicist Luis Alvarez, his son, geologist Walter Alvarez, and a group of colleagues discovered that fossilized sedimentary layers found all over the world at the Cretaceous-Tertiary boundary, 65.5 million years ago contain a concentration of iridium hundreds of times greater than normal. The end of the Cretaceous coincided with the end of the dinosaurs. It was in general a period of extraordinary mass extinction, leading to the Tertiary Period of the Cenozoic Era, in which mammals came to dominate on Earth. The paper suggested that the dinosaurs had been killed off by the impact of a ten-kilometer-wide asteroid on Earth (see impact event). Two facts supporting this conclusion are that; iridium is relatively abundant in many asteroids, and the isotopic composition of iridium in K-T layers resembles that of asteroids more closely than that of terrestrial iridium. Wikipedia
   
 

The Smoking Guns

Dinosaur Fossils
Iridium Layer
Impact Crater
Shocked Quartz

   
                                     
Princeton paleontologist produces evidence for new theory on dinosaur extinction  
   
 
                                                 
1 - Dino Death
Affirmative
Numerators

Numerators
-vs-
Denominators
Negative
Denominators
Aileen
Lauren
Cynthia
Jennifer
Tania
Kim
Christine
Michelle
    Debate Scoring and Rules
PodCast--->aif
Comments
April 27, 2006
 
Recording Instructions
1,2

a. Practice with a short recording to make sure everyone can be heard clearly.
b. Place the recorder in the middle of the debaters and begin recording the debate.
c. Don't pause the recorder or stop the recording. Let the recording continue for the entirety of the debate.
d. After you are finished recording the debate. Stop it and Lock it for safety.

  
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2 - Dino Death
Affirmative
Team Ram Rod		 Team Ram Rod
-vs-
Team Weak Sauce

Negative
Team Weak Sauce

Ashley Megan
   
Sandee Sergio
   
 
John   Marc
       
Redmond  
Debate Scoring and Rules
Debate PodCast---> wmv
4/25/2006
Recording Instructions
1,2

a. Practice with a short recording to make sure everyone can be heard clearly.
b. Place the recorder in the middle of the debaters and begin recording the debate.
c. Don't pause the recorder or stop the recording. Let the recording continue for the entirety of the debate.
d. After you are finished recording the debate. Stop it and Lock it for safety.
                 
  Example Debate Form 1,2,3
                 
  Only 32 students can evaluate this debate.

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Please do not evaluate this debate unless you were able to make a reservation

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