40 NATURAL RESOURCES OF HOME ENVIRONMENT 



Suggested Projects. 



1. TO PRODUCE AN ARTIFICIAL AIR AND COMPARE ITS PROPERTIES 

 WITH NATURAL AIR. 



2. TO MAKE A STILL AND PRODUCE DISTILLED WATER IN MY 

 HOME LABORATORY. 



3. TO PRODUCE FIRE BY SOME PRIMITIVE MEANS. 



35 



1000 



DensU 

 1 



30000 



What is environment ?- 

 Every boy and girl, yes, and 

 every living plant and animal, 

 no matter where they live, come 

 in contact with certain things in 

 their surroundings. Air is every- 

 where around us. Light is nec- 

 essary to us, so much so that 

 we use artificial light at night. 

 We live either on soil in the 

 country, or if in the city, we 

 come in contact with the hard 

 and often dirty paving stones 

 and sidewalks. Water and food 

 are both necessary. If the tem- 

 perature falls below a certain 

 point, we put on heavier clothes. 

 Heat, then, is evidently a neces- 

 sary factor or part of our sur- 

 roundings. All these things to- 

 gether, air, water, heat, light, 

 food, soil, and the living things 

 that surround us, make up our 

 environment. 



Living in an ocean of air. We are all fully aware 

 every day that air is about us. We live in an ocean of air, 



10 



3-75 



The ocean of air. 



