OUR ENVIRONMENT AND HOW WE USE IT 21 



TEST ON FUNDAMENTAL CONCEPTS 



Make two vertical columns in your workbook. Head one CORRECT, 

 the other INCORRECT. Under the first place the numbers of all statements 

 you believe to be correct. Under the second place the numbers of all state- 

 ments you believe to be incorrect. Your grade = right answers X 2. 



I. We get first-hand knowledge of our environment through : 



(1) our minds; (2) our senses; (3) our sense organs; (4) the 

 nerves which cause movement of muscles ; (5) talking with our 

 friends. 



II. The factors of the environment are : (6) water ; (7) clouds ; 

 (8) the things inside of a house; (9) air; (10) degrees of heat. 



III. The method of the scientist: (11) uses the experiment; 



(12) means having a decided point of view and holding to it ; 



(13) uses the senses ; (14) is essentially problem solving ; (15) uses 

 the facts in order to draw conclusions from them. 



IV. Green plants use from their environment: (16) water; 

 (17) dissolved minerals; (18) sunlight; (19) insects; (20) milk. 



V. The following things are made of matter: (21) water; 

 (22) a feather ; (23) a thought ; (24) a person's brain ; (25) light. 



VI. There is energy used when: (26) we chew our food; 

 (27) a balloon rises ; (28) a falling balloon hits the ground ; 

 (29) water freezes ; (30) lightning strikes a tree. 



VII. Animals use the following from their environment : 

 (31) plants; (32) nitrogen of the air; (33) water; (34) oxygen 

 from the air; (35) sound. 



VIII. The following are chemical changes : (36) cooking meat ; 

 (37) soldering two pieces of tin together ; (38) freezing ice cream ; 

 (39) sharpening a knife on a stone ; (40) digesting food. 



IX. An example of a physical change is : (41) throwing a stone ; 

 (42) lighting a fire ; (43) putting out a fire ; (44) dissolving salt 

 in water ; (45) writing these words. 



X. The use of the scientific method helps (46) to dispel 

 superstitions ; (47) to tell which horse will win every time ; (48) one 

 to think straight ; (49) to make discoveries ; (50) to apply facts 

 in useful inventions. 



THOUGHT QUESTIONS 



1. What are two things which everything contains and neither 

 of which would be of any use without the other ? 



2. Can you usually tell by observation whether a change in 

 body is a physical or chemical change? Explain. 



