LONGITUDE AND TIME 185 



5. What is the number of the meridian on the opposite side of the 

 world from Greenwich? 



6. How does the length of a degree on any circle north or south of the 

 equator compare with a degree on the equator? Why? 



7. Draw a circle and divide it into 4 equal parts by lines running 

 through its center. W T here the lines cross, four right angles are formed. 

 By means of a protractor, find how many degrees there are in a right 

 angle. 



8. Draw a line through your circle, making an angle of 45 degrees 

 with a horizontal line. 



9. Draw a circle to represent the earth and indicate by a line the axis 

 tilted the proper number of degrees from the perpendicular. 



10. What is the name of the zone bounded by the antartic circle? 



11. How many degrees are there from the equator to either pole? 



12. How far north or south of the equator is the sun exactly overhead 

 at some time of the year? 



13. What zone do the tropics bound? 



14. How many degrees wide is it? 



15. How wide is each frigid zone? 



16. How wide is each temperate zone? 



17. If you go to a place where nothing obstructs the view, how many 

 degrees will there be in your horizon^. 



