Glass Trace Evidence Essay

The popular television show, CSI: Crime Scene Investigations has been on the air for 12 years, and it has brought forth the behind-the-scenes actions of criminal investigations, even if its portrayals are not always scientifically accurate. This has caused an interest in the forensic sciences that has led most people to a skewed view of how a criminal investigation actually works. The reality of a criminal investigation is that it is generally more tedious and difficult than the theory of criminal investigation would have you believe. By examining the forensic and investigative procedures of the case of Pamela Foddrill, it is apparent that the theory of criminal investigation was not representative of the procedures concerning examination

Also, having records of the crime scene allows investigators to look back over the evidence as it appeared at the scene long after the crime scene itself is gone.

16. According to the information in the table, which type of glass is Unknown D?

A wall of glass separated Stella, Mark, and I, which explained the visual effects. It didn’t seem to be much of a problem. Stella was banging on the glass and pointing on the floor. I searched the ground for whatever she was pointing at. A glass vial, a shovel, a Roman-era axe (how was that there?).

When most people see beautiful pottery or a delicate glass bowl, their minds do not go right to the science behind the art. They see the pot or bowl and only see the beauty and creativity that was required to make something so unique. Little do most people know, the artist is using chemistry to manipulate the material into something beautiful. As seen in pottery, from the molecular structure to its glazing, as well as the amorphous properties of glass and glassblowing, chemistry plays a vital role in the beauty of art, and it is important for artists to know the scientific processes behind their work.

The purpose of this lab is to use chemical and physical properties to identify a material. We are working on observing, inferring and predicting. We are learning if the properties of materials that appear similar can be used to tell them apart.

Broken glass is a hassle that no one wants to have to deal with. That is, no one except for Majestic Glass. Majestic Glass is passionate about serving the Sydney area with expertise, excellent customer service, and 24-hour service.

I observed the bedroom window to be smashed and small hole in the bottom of the window. I observed the screen for the window to have a tear. I also observed shattered

Auto glass is an essential part of the protection of the vehicle. It keeps the occupants safe inside the vehicle. It acts as a barrier between the driver and road. The auto glasses parts are the most exposed to risk and often suffer the most damage. Thousands of accidents in Massachusetts occur due to poorly maintained windshield. If you have crack or chip on the windshield then it is necessary to get it to the whitby Windshield Replacement service providers. Repair or replacement of the cracked windshield immediately ensures the safety of the occupants inside the vehicle and others on the road.

Where did it come from? Spinning around in search of the source, I notice that the dry cleaning shop behind me no longer has a front. Jagged edges of glass cling to the frame, but I can’t figure out how the glass broke, how it got onto the ground, creating a blanket of danger across the pavement.

You don't need to assume a part in a pile up to encounter a broken auto glass. Matter of truth, rock chips are a standout amongst the most well-known reasons for broke or chipped windshields. The troublesome part to shake chips are there that there is no real way to keep away from them - also if the chipped glass abandons consideration, the break

Results - The results supported that of the first experiment. The participants in the smashed condition overestimated the speed of the cars. The participants who reported seeing broken glass: Condition|% who answered yes. Smashed|32%, Hit|14%, Control|12%.

Glass has a variety of unique properties. Glass is hard, very brittle, a good insulator, and does not react to other chemicals easily. In addition to this, glass is considered an amorphous solid. This means that the molecular structure of glass is mostly random. This is because in the process of making glass, glass is cooled so quickly that it does not have time to form or create a structure at the molecular level. This process is known as quenching.

Today, more than ever, the quality of evidence in criminal cases is scrutinized because of contamination. Contamination is the introduction of something that physically corrupts a substance at a crime scene that was not previously there; it comes in many forms and most often times comes from the humans who investigate a crime scene. It is imperative that prevention of cross-contamination is implemented when gathering evidence. Several of the more sensitive forensic techniques such as trace analysis, bloodspatter interpretation, and DNA comparison are not being used to their fullest potential. Items of physical crime scene evidence are not always visible to the naked eye and may be easily overlooked so deliberate and methodical approach to collection and preservation of evidence is essential. Prosecutors have lost cases due to crime scene contamination; this could be prevented by simple and productive behaviors. The U.S. Supreme Court, in a leading case on physical evidence, stated:

One of the most used materials in human history is glass or more specifically silicate glass. Although some types of glasses are called crystal glass, glass is actually an amorphous solid and does not have a crystal structure. It is used in all walks of life ranging from homes to automobiles to laboratories. Historically, the one of the first types of glass that was used by humans to make tools and weapons was the volcanic glass known as obsidian. As for manmade glass, the earliest accounts date back to 5000 BC in the middle east. Primitive methods of glass making were used until about 100BC, when glassblowing was believed to be discovered. This discovery made glass products popular in the Roman Empire since the development of glassblowing allowed glass production to be more efficient and thus less expensive. As the centuries went on more techniques were developed which eventually lead to glass products being widespread. This paper will discuss some of the methods of glass production throughout history, the types of silicate glass, and the different ways that glass can be colored.