Observations
What is a observation in Forensic Science ?
An observation os information gathered using the senses without adding personal opinions or conclusions
What is a Crime Scene
A crime scene is any location where a crime may have occurred or where evidence related to a crime is found
Why is blood important evidence at a crime scene
Blood can provide information about what happened , who was involved , and sometimes the order of events
What does DNA stand for?
DNA stands for deoxyribonucleic acid
What are fingerprints
Fingerprints are the unique patterns of ridges and lines on the tips of a persons fingers
What is the difference between an observation and an inference?
An observation describes what is directly noticed , while an inference is a conclusion or interpretation based on those observations
Why must a crime scene be secured ?
To prevent evidence from being damaged , moved ,or contaminated
What is plasma
Plasma is the liquid part of blood that carries nutrients , hormones, and waste
Where is DNA found in the body?
DNA is found in the nucleus of most cells
What are the 3 main fingerprint patterns
Loops , Whorls , and Arches
Why are observations important as a crime scene ?
Observations help investigators document details accurately before evidence is disturbed or lost
Who is usually the first person to arrive at a crime scene
a police officer or first responder
They help fight infections
Why are identical twins difficult to tell apart using DNA
They have nearly identical DNA
When do fingerprints form
Fingerprints form before birth and remain the same throughout a person's life
Name 3 senses that can be used to make observations
Sight , Smell , and hearing
What is physical evidence
Any object or material that can provide information about a crime
What is blood typing ?
Blood typing determines a persons blood group such as A,B,AB, or O
What is the role of DNA database in forensic science
They store DNA profiles that can be compared to crime scene evidence
How are latent fingerprints made visible
Using fingerprint powder , chemicals, or special lighting
How can bias affect observations ?
Bias can cause investigators to overlook evidence or interpret details incorrectly
Give 2 examples of physical evidence
Fingerprints & footprints
What is a blood stain
A bloodstain is blood that has left the body and come into contact with a surface
Why must DNA evidence be carefully documented
To ensure accuracy and maintain chain of custody for court use
How do fingerprints help solve crimes
They help link a person to an object or location