10 THE SUN, STARS, AND PLANETS 



street and turn into a side street, how many degrees do 

 you turn? 



6. What is a protractor? For what is it used? 



7. If you face the south, where is the east? The 

 west ? 



8. If you are facing east, how much must you turn 

 in order to face north? Would you turn toward the left 

 or toward the right? 



6. The Direction of Sunrise and Sunset 



Where did the sun rise this morning? Where did 

 it set last night? Does the sun always rise in the same 

 place? Does it always set in the same place? Where 

 would the shadow of a stick point at sunrise? Where at 

 noon? W^here at sunset? An experiment is the best 

 way of answering these questions. 



Experiment 5. *The Direction of Sunrise and Sun- 

 set by Shadows. 



Apparatus: Hatpin, protractor. 



a. Stick a hatpin into the North-South line which 

 you determined in Experiment 1, or in Experiment 3. 

 Mark its shadow at sunrise and at sunset. Place the 

 straight side of the protractor along the North-South 

 line, with its center mark at the hatpin, and tell how 

 many degrees the direction of sunrise is from the North- 

 South line. Repeat for the direction of sunset. The 

 direction of sunset is as much away from the south direc- 

 tion as is the direction of sunrise. See if this is the same 

 after a few days. If this is true we can learn the di- 

 rection of sunrise by knowing the direction of sunset. 



This experiment can be performed only at home. 



