NATUBE-STUDY LESSONS. 183 



9. («) In what direction from the school building does 



the sun rise above the horizon at an equinox? 

 (^) In what direction does it then set ? 



(c) When the days and nights are of equal length 



observe two points on the horizon where the 

 sun appears to rise and to set, and fix each 

 by some landmark, as a tree or house. 



(d) Imagine the points marked by these landmarks 



joined by a line. In what direction does this 

 line run ? 



10. When the shadow is shortest, compare the length 

 of the day and night. 



11. (a) Where does the sun rise and where does it set 



when the shadow is shortest? 

 (fi) Observe these two points on the horizon and 

 fix each by some landmark. 



12. When the shadow is shortest, in how many days 



does it begin to grow longer? 



The time of the year when the sun is highest in the heavens is called 

 the summer solstice. At that time the sun has reached the limit of its 

 northward movement and apparently stands still for a few days before 

 beginning its southward motion. 



1 3. When the shadow is longest, compare the length 

 of the day and night. 



14. (a) Where does the sun rise and where does it set 



when the shadow is longest? 

 (J>) Observe these two points on the horizon and 

 fix them by some landmark. 



15. When the shadow is longest, in how many days 



does it begin to grow shorter? 



The time of the year when the sun is lowest in the heavens is called the 

 winter solstice. At that time it has reached the limit of its southward 

 movement and apparently stands still for a few days before beginning its 

 northward motion. 



