Name:_____________________________________________________

1. About    _______________________ %   of incoming solar radiation is absorbed at Earth's surface.



2. Because Earth's surface is much cooler than the Sun, it emits    shorter    or    longer    (circle one)
   
   wavelength radiation and is absorbed by certain gases in the atmosphere.



3. What are the two main heat absorbing gases in the atmosphere?    ______________________________________
   
   _______________________________________



4. What happens to the outgoing Earth radiation, once it is absorbed by the atmosphere?
   
   ____________________________________________________________________________________________________
   
   
   ____________________________________________________________________________________________________



5. Once energy has left Earth's surface, it cannot be reabsorbed.    True    or    False    (circle one)?



6. Earth's average surface temperature would be  ______________°F    ______________°C  colder without an atmosphere.
   
   Why?    _____________________________________________________________________________________
   
   
   _______________________________________________________________________________________________



7. What environmental issue is related to the greenhouse effect?    __________________________________________



8. A rise in carbon dioxide can cause temperatures to    increase    or    decrease    (circle one).



9. Why is the level of carbon dioxide rising?
   
   ____________________________________________________________________________________________________
   
   
   ____________________________________________________________________________________________________



10. What are two possible impacts of global warming?
    
    
    1. ___________________________________________________________________________________________
    
    
    
    2. ___________________________________________________________________________________________