what are some examples of incomplete combustion? 1.bunsen burner with air hole closed 2.starting a...
TRANSCRIPT
What are some examples of incomplete combustion?
1. Bunsen burner with air hole closed2. Starting a wood fire or bbq3. Turning a log-burner down low overnight4. Engines or boilers that have not been serviced
Why is incomplete combustion particularly dangerous?
1. Soot (carbon) makes things dirty2. Soot can irritate the lungs and cause respiratory disease3. Smog in Christchurch4. Carbon monoxide is poisonous because... ... it prevents oxygen binding to haemoglobin in your blood5. CO is particularly dangerous because it is colourless and
odourless (can’t smell it)
Do now:Tuesday, April 18, 2023
Learning Objectives
Understand that scientists’ investigationsare informed by...
1) current scientific theories, and
2) evidence that will be interpreted through logical argument
Do now:
Imagine: You come in to the lab and Mr Cooper is nowhere to be seen.All you can see are his shoes and some charred remains.
Explain: Use the fire triangle, or other
scientific theory, to write down
an explanation for his mysterious disappearance
Theory 1:
Static electricity builds up in or on the body...
... and is ignited by a new subatomic particle called a pyroton, which interacts with human body cells
... but no scientific evidence proves the existence of this particle
Source: http://science.howstuffworks.com/science-vs-myth/unexplained-phenomena/shc1.htm
Theory 2:
Methane builds up in the intestines...
... and is ignited by enzymes (proteins in the body that act as catalysts to induce and speed up chemical reactions)
... but most victims of spontaneous human combustion suffer greater damage to the outside of their body than to their internal organs, which seems to go against this theory
Source: http://science.howstuffworks.com/science-vs-myth/unexplained-phenomena/shc1.htm
No one has ever conclusively proven or disproven the truth of spontaneous human combustion... ...how would you?
Most scientists say that there are more likely explanations:
• many victims were smokers who were later discovered to have died by falling asleep with a lit cigarette...
• a number of victims were believed to have been under the influence of alcohol...
• a number of victims suffered from a movement-restricting disease that prevented them from escaping the fire...
• some of the fires and strange states of the victims' bodies were the result of a criminal act and subsequent cover-up