Trace Evidence Questions：微量物证的问题.doc

Trace Analysis Questions Physical Properties What is the difference between a physical property and a chemical property? What is matter and what is it made up of? What are compounds and how are they made? What is the periodic table? What kind of information can you find in it? Describe the three states of matter. What is the fourth state of matter? What is a phase? Describe all of the phase changes? Draw and label light as a wave. Describe five things that can happen to light as it interacts with other matter. Draw and label the electromagnetic spectrum. Describe light as a particle. Describe five other physical properties mentioned in the powerpoint. What is an intensive property? Give an example. What is refractive index? Birefringence? Vocabulary Physical property Chemical property Phase changes Light properties Intensive properties Refractive index Birefringence Glass Evidence Describe the different types of glass by composition. How is tempered glass and laminate glass different? What is the only way to individualize glass from a crime scene? What is flotation and how does it work? Explain how a forensic scientist determines the refractive indices of suspect glass fragments. What is the 3R rule and what does it tell a forensic scientist? How can you tell which of two fractures on a piece of glass was created first? Vocabulary Tempered glass Laminated glass Becke line Radial fracture Concentric fracture Hair Evidence Draw and label a cross section of a hair. Draw and label a longitudinal section of hair. Describe the different phases of hair growth. What is the follicular tag? What features of a hair do forensic scientists note when examining it? How can you tell the difference between a human hair and an animal hair? What can and can’t you learn about hair by examining it? Vocabulary Cuticle Cortex Medulla Anagen phase Catagen phase Telogen phase Follicular tag Fiber Evidence Give some examples of natural fibers. Give some examples of synt