Ralph
What is the scientific name of DNA
Deoxyribonucleic Acid
What is the shape of DNA
a double helix
What are the strands of DNA made of?
sugar, phosphate, and nitrogen bases
Why is DNA fingerprinting called a fingerprint
DNA is just as unique as your fingerprint
What is the first step to making a DNA fingerprint?
make millions of copies of DNA
What is the second step to making a DNA fingerprint?
cut the DNA into different-sized pieces
What part of the gun leaves unique markings on a bullet?
Barrel
What tool makes thousands of copies of each piece of DNA?
PCR Machine (Polymerase Chain Reaction)
What is ballistics in forensic science?
The study of motion and impact of projectiles.
What is the third step to making a DNA fingerprint?
seperate the DNA pieces of size
What is a cartridge?
A complete round of ammunition.
What is a "caliber" in firearms?
The diameter of the barrel and bullet.
What is gunshot residue (GSR)?
Trace chemicals left on the hands or clothes of someone who fired a gun.
What is an accelerant?
Any material used to start or maintain a fire.
What tool is used to examine bullets and cartridge cases under magnification?
Comparison microscope
Why is it important for CSI to begin investigating immediately after a fire?
Some accelerants can evaporate.
Which way does fire move?
Up
What is an exothermic reaction?
When heat is released during the reaction.
What is an endothermic reaction?
When heat is absorbed during the reaction.
What is spontaneous combustion?
A fire caused by a natural heating process in the presence of sufficient air and fuel.
How does CSI collect fire evidence from a crime scene?
By placing it in a paint can.
Which of the following would help determine the distance from which a gun was fired?
a. Bullet weight
b.Bullet shape
c.Presence of GSR or stippling (powder and bullet dots) on a target
d.Gun manufacturer
Presence of GSR or stippling (powder and bullet dots) on a target.