II. THE ENVIRONMENT OF PLANTS AND ANIMALS 



Problem. To discover some of the factors of the environ 

 ment of plants and animals. 

 (a) Environment of a plant. 

 (&) Environment of an animal. 

 (c) Howie environment of a girl or boy. 



LABORATORY SUGGESTIONS 



Laboratory demonstrations. Factors of the environment of a living 

 plant or animal in the vivarium. 



Home exercise. The study of the factors making up my own environ 

 ment and how I can aid in their control. 



Environment. Each one of us, no matter where he lives, comes 

 in contact with certain surroundings. Air is everywhere around 



us ; light is necessary to us, so much so 

 that we use artificial light at night. The 

 city street, with its dirty and hard paving 

 stones, has come to take the 

 place of the soil of the village 

 or farm. Water and food are 

 a necessary part of our sur 

 roundings. Our clothing, 

 useful to maintain a certain 

 temperature, must also be 

 included. All these things 

 air, light, heat, water, food together 

 make up our environment. 



All other animals, and all plants as 



An unfavorable city environ- Well > are surrounded by and US6 prac- 



ment. tically the same things from their en 



vironment as we do. The potted plant 



in the window, the goldfish in the aquarium, your pet dog at 

 home, all use, as we will later prove, the factors of their environ- 



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