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Vocabulary
More Vocab
General Knowledge
Questions 1
Questions 2
100
Marks left when an object is pressed against the surface of another object.
What is prints.
100
A written court order that allows police to search for specific objects at a given place and time.
What is a search warrant.
100
Firing a gun leaves impressions on a bullet. These spiral grooves are called _____________.
What is rifling.
100
By studying skid marks, investigators can determine the direction and _____ of a vehicle.
What is speed
100
Explain how the marks on a bullet are made when a gun is fired. What does a firearms expert need to do to match a bullet from a crime scene to a specific gun?
What is: Rifling in a gun barrel leaves marks on a bullet. The expert must use the gun to test fire a bullet and use a microscope to compare the marks on the two bullets.
200
Flat prints that have two dimensions.
What is imprints.
200
Tiny amounts of physical evidence that are transferred at a crime scene.
What is trace evidence.
200
The PDQ is a database for what type of samples?
What is paint.
200
A CSI pours this substance into a footprint to make a cast.
What is dental stone
200
A computer database can be used to help match firearms evidence. What are TWO advantages of this method?
What is: 1. A computer saves time 2. Database has large amounts of data. (The analyst may not have a weapon to test fire.)
300
Prints that have three dimensions--length, width, and depth.
What is impressions.
300
The grouping of similar objects together is called this.
What is classifying.
300
Name one of the two popular types of synthetic fibers used today .
What is nylon or polyester.
300
Shoe prints and tool prints are found at a crime scene. Which are likeley to be more useful in identifying a suspect? Explain why.
What is: Shoe prints are more useful. They can be matched to a suspect by the wear pattern. Tools could be borrowed or stolen.
300
A crime scene team is investigating a fire in an old warehouse. They suspect that the fire may have been caused by arson. An eyewitness reported seeing a van speeding down the street near the warehouse just before the fire. The witness recalls part of the license plate number. Question: What kind of trace evidence will the team look for to determine if arson took place? Which crime scene member would be most useful in finding this evidence?
What is: The team should use arson-sniffing dogs to look for accelerants.
400
Mark left when a vehicle with locked wheels slides along a road surface.
What is skid mark.
400
The amount of a substance in a given mass or volume of a mixture is called this.
What is concentration.
400
Tell me what gunshot residue is.
What is The residue that sprays out of the barrel and trigger hole that lands on the hands, face, and clothes of the person who fires the gun.
400
Why is it necessary for police to obtain search warrants when looking for evidence? Give TWO reasons.
What is: 1. Search warrants protect the rights of the suspects and 2. Ensures that the evidence found will be able to be used in court.
400
To examine two samples of trace evidence at the same time, an investigator would use a(n) ________ microscope.
What is comparison.
500
An object made by filling a mold with a liquid that takes the shape of the mold as it changes to a solid.
What is cast.
500
One way to separate a mixture. (This means "to graph color")
What is chromatography.
500
Police used the license plate number to identify 30 vans that might have been at the crime scene. What must the crime lab do to connect the evidence that was collected at the crime scene to one of the vans? (There are three answers)
What is: 1. Use a tire print database to identify the tire 2. Get tire prints from vans with that type of tire 3. Compare those prints to the prints from the crime scene
500
Which fibers are more useful in identifying a suspect: fibers that a suspect brings to the crime scene, or fibers that the suspect carries away from the crime scene? Explain why.
What is: Fibers that a suspect brings to a crime scene is more useful because they can be compared to fibers from the suspect’s home. Objects with fibers that are carried away maybe washed or thrown away.
500
What evidence could the team look for at the crime scene that might be used to connect a van to an arson fire? How would investigators collect this evidence? (Remember your first video of the chapter with the truck)
What is: They could look for tire tracks or impressions; take photos or make a cast.