i o Sun A ir A ttr action Heat. 



It is really the earth, or that part of it on which 

 we live, that moves around the other way, to- 

 ward the sun in the morning, and away from it 

 all the afternoon ; that is, from the west over to 

 the east. When you are on a steamboat sail- 

 ing swiftly and smoothly, the trees on the shore 

 appear to move toward you, then past and be- 

 hind you, yet you know it is the steamboat 

 that moves not the trees. 



1 8. Without the sun we should have no heat 

 or light. Would we not have wood to burn 

 and give us light ? We would not ; for without 

 the sun's heat trees would not grow. Would 

 we not have the moon to shine for us? 

 The moon would not give us any light, for it is 

 the sun shining upon the moon that makes it 

 bright and gives us moonlight nights. So, with- 

 out the sun, there would be no light on the 

 earth no plants, trees, animals, birds, fishes, or 

 people. 



19. You have learned how important are the 

 sun, air, and attraction. You will, in the next 

 chapter, learn about rain, how it depends upon 

 the sun, air, and winds, and how they all work 

 together beautifully and continually in order 

 that all people may have food to eat, water to 

 drink, and pleasant places to live in. 



SPELL AND DEFINE Day, light, night, coal. 



