Science Bowl

GENERAL SCIENCE

General Science - 35

GENR-93; Multiple Choice:  High-temperature superconductors have been in the news lately. 
These materials become superconductive at temperatures around 
 

w)   200 degrees Fahrenheit 
x)   100 degrees Fahrenheit 
y)  -150 degrees Fahrenheit 
z)  -350 degrees Fahrenheit 

ANSWER:  Z -- -350 DEGREES FAHRENHEIT 

  
GENR-93; Multiple Choice:  If a scuba diver suffers from the "bends", this means that which gas 
is being rapidly released from the blood and tissues? 

w)  oxygen 
x)  hydrogen 
y)  nitrogen 
z)  CO2 

ANSWER:  Y -- NITROGEN 

GENR-93; Multiple Choice:  The principle behind a breeder reactor is:   

w)  U-235 undergoes fission. 
x)  U-238 is converted to Pu-239, which undergoes fission.
y)  Deuterium undergoes fission. 
z)  Cobalt-60 undergoes fission. 

ANSWER:  X -- U-238 IS CONVERTED TO Pu-239, WHICH UNDERGOES

FISSION.   
 
GENR-93; Multiple Choice:  Steel is composed of a number of elements.  The two essential 
elements are iron and 

w)  aluminum 
x)  carbon 
y)  nickel 
z)  silicon 

ANSWER:  X -- CARBON