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FORENSIC SCIENCE - Coggle Diagram
FORENSIC SCIENCE
FAMOUS DETECTIVES
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Famous Five: Julian, Dick, Anne, Tomboy George and their dog Timmy
POLYGRAPH MACHINE
in 1921, Dr. John Larson did an experiment in a lie detection machine with 1,5 metres in length and weighs about 13 kilograms
He tested the machine on a volunteer and asked a series of questions, and the machine recorded his blood pressure, pulse and respiratory rate with each answer given.
with experience, he found that the information came out as jagged lines. When people get stressed, there are violent ups and downs along those lines. After the interview, he looked at the information and found out when the man had lied and when he had been honest.
With that, he sent a letter to a friend of the police recounting the experience and suggested that the department use the machine to help with the investigation.
HISTORY
in 1892, British scientist Francis Galton wrote a book about fingerprints and decide that all fingerprints can be placed into one of three main groups: loops, whorls or arches. And he identified the small details that make each fingerprints unique
in 1900s, Austrian doctor Karl Landsteiner learned that not everyone has the same kind of blood, and this are another important development in forensic science
many people have the development of forensic science, like in 1800s peoples learned of the importance of fingerprints and how can use this in investigations
in the past only 5 senses were used to find clues to solve crimes, but today there are careful tests and examination of evidence more precisely
in 1910, Edmond Locard made a theory that every criminal takes something away and leaves something behind at a crime scene
1984, Alec Jeffreys discovered that our bodies are made up of small parts called cells and, in the center of these cells, have nuclei with information that is our DNA.
JOB: FORENSIC SCIENTIST
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He is a wide field with many different specialities. Some scientists match bullet casings to guns, and others use hair samples to identify suspects
The forensic anthropologist studies human skeletons to estimate the age, sex, ethnicity and size of individuals. Like other forensic anthropologists, they testify in court when someone is on trial for a crime related to a case.