-Arson and explosions often present complex and difficult circumstances to investigate due to the fact that the perpetrator has thoroughly planned the act, is not present during the act, and the destruction is so extensive.
-The criminalist’s function is rather limited to detecting and identifying relevant chemical materials collected at the scene and reconstructing and identifying ignitorsor detonating mechanisms.

Also included:
-The Chemistry of Fire
-The Fire Scene
-Collection
-The Basics
-Gas Chromatography
-Explosions
-The Explosive Market
-Collection & Analysis
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The 18-year-old critically injured in an explosion Thursday at an Ottawa high school has died from his injuries, CBC News has learned. The 18-year-old student critically injured in an explosion Thursday at an Ottawa high school has died from his injuries. CBC News has confirmed that Eric Leighton died Thursday evening in hospital, following an explosion during an auto shop class at Mother Teresa Catholic High School. Emergency crews were called to the scene at 10:40 a.m. Thursday morning after an empty 55 US gallon drum containing oil residue exploded in the school's auto shop class, according to a joint statement from Ottawa police, fire services and paramedics. Read attached article for more.

Students learn about the underlying factors that can contribute to Plinian eruptions (which eject large amounts of pumice, gas and volcanic ash, and can result in significant death and destruction in the surrounding environment), versus more gentle, effusive eruptions. Students explore two concepts related to the explosiveness of volcanic eruptions, viscosity and the rate of degassing, by modelling the concepts with the use of simple materials. They experiment with three fluids of varying viscosities, and explore the concept of degassing as it relates to eruptions through experimentation with carbonated beverage cans. Finally, students reflect on how the scientific concepts covered in the activity connect to useful engineering applications, such as community evacuation planning and implementation, and mapping of safe living zones near volcanoes. A PowerPoint® presentation and student worksheet are provided.