SURVEY QUESTIONS 



What makes it possible for you to 

 see some objects in the room ? 



Do you know why you cannot see 

 the air? 



If it were not for mirrors, how could 

 you tell how you looked? 



Do you know where the sky, the 

 moon, and the electric lamp get 

 their light? 



Why is good light needed in taking 

 pictures ? 



What causes a rainbow ? 



Can you define color and tell what 

 causes it ? 



Why are not all the lenses in eye- 

 glasses alike ? 



Publishers' Photo Service 



