17) cerebellum 
18) temporal lobe
iam sorry about the others their answers are not in the paragraph 
 
        
             
        
        
        
Answer:
You need to use the scientific method and <u>knowledge of the environment and earth systems</u> in order to work as an environmental scientist. 
Explanation:
An environmental scientist works based on the fact that it has the knowledge of the environment and he is aware of the interaction between the environment and other components associated with it.
An environmental scientist study about the effect of environment on plants and animals as well as earth systems to protect, understand and develop research methods.
 
        
             
        
        
        
TDS, Total dissolved solids (TDS) is measured as a volume of water with the unit milligrams per liter