34 THE WORLD WE LIVE IN 



diseases. This care of the artificial environment is known as 

 sanitation, while the care of the individual for himself is known 

 as hygiene. 



Self-Testing Exercise 



The environment is our (1). With man much of this en- 

 vironment is (2) . He can (3) his environment while 



other living things (4) do this. The (5) of the 



artificial environment is called (6), the care of the individual 



for himself without considering his (7) is (8) . 



Organization of work. In each unit there are certain funda- 

 mental things that we must learn and do. Everything in a unit 

 is not of equal importance. It, therefore, is necessary for you to 

 decide on the most important material from which you will make 

 your recitation. To make this organization, a summary outline 

 which you can use as a guide is helpful, as : 



The tree a living thing Energy — forms of 



What does it use in its environment? Conservation of 



How does it get it ? Foods and nutrients 



Matter — what is it ? Kinds of each 



Elements and compounds Control of environment by man 

 Oxygen and oxidation 

 Elements found in living things 



In all except the first two or three units, there will be no sum- 

 mary outline and you will be expected to make one for your note- 

 book. You should also test your knowledge of the unit in the 

 following ways : (1) answer and check all of the survey questions ; 

 (2) perform all assigned exercises or laboratory work ; and (3) check 

 with your teacher the various self-testing exercises, including the 

 final test on fundamental concepts and the attainment test. 



Test on Fundamental Concepts 



Make in your notebook two vertical columns, one headed CORRECT and the other 

 INCORRECT. In the first column place the number of the statements you think are right, in 

 the second the ones you think are wrong. Your grade = number right X 4. 



I. The environment (1) contains the same chemical elements as do 

 the living things in it ; (2) has the same chemical composition as living 

 things ; (3) is everything that surrounds us ; (4) can be controlled by 

 man ; (5) determines the kind of plants or animals living in it. 



