CRJ 320 WEEK 4 Assignment I Chapter 7 AND Chapter 

CRJ 320 WEEK 4 Assignment I Chapter 7 AND Chapter 8
Directions Please answer each of the following questions and ensure that each response is at least one page in length.  Please use proper APA formatting and cite any sources used.  Visit the Academic Resource Center for concise APA guidelines.

Chapter 7 Essay Questions:

1.	How can a scanning electron microscope be used to identify the elements present in a specimen?

2.	How can a scanning electron microscope be used to determine whether a suspect has recently fired a gun?

Chapter8 Essay Questions:

1.	What is a precursor? How is possession of a precursor treated under the Controlled Substances Act?

2.	List and describe the two phases in a criminalist- scheme of action for identifying a drug.

3.	What two goals must laboratory testing accomplish to positively identify a drug?

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