Loading presentation...

Present Remotely

Send the link below via email or IM


Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.



No description

Simon Tran

on 28 May 2015

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Fire!!!!

If that gave you a heart attack, we're sorry (not really), but we don't offer compensation
Told you we're not sorry!
What creates the shape
Basic Chemistry
What makes fire blue?
What makes the other

Carbon Monoxide: Is the most abundant and is in all fires. It causes the body to displace oxygen in the blood.
Hydrogen Cyanide: Is produced by burning wood, silk, plastics, and nylon.
Hydrogen Chloride: Irritates your eyes and throat. This gas makes it hard to breathe.
Carbon Dioxide: When there is too much of this in the air, it causes you to breathe faster.
In the case of a candle, when the flame is lit, the oxygen atoms collide with the carbon and hydrogen that is the wax. Soon after, the carbon and hydrogen come off the candle as a gas. Next, the atoms undergo pyrolysis and rearrange. The resulting chemiluminescence gives off the blue light that you see. Since camp/bonfires (typically) aren't made of wax, or other things with hydrocarbons, those types of fires aren't blue. Typically, only those fires who have hydrocarbons are blue (unless they are scientifically prepared).
When there isn't enough oxygen, then there is left over carbon which makes soot. The soot is black, so it soaks up heat and releases the acquired energy through incandescence. The more energy the soot has, the brighter it glows. So when it's closer to the base of the flames, it's bright and yellow. As it gets farther away, the energy starts to disperse. Since the more energy/heat soot has, the brighter it glows, the farther it gets from the flame the duller it gets. This leaves a redish color.

Required amount per hydrogen-carbon combo
The flame is hot... or is it?
The chemiluminescence is actually not hot. However! Before you go do something stupid like sticking you finger into a bonfire, the fire itself is really hot*. This is because of the rapid vibration of the molecules as they rearrange. Anything near it resonates with it rapidly, creating friction between molecules and therefore, heat. This is called oxidation
* We are not responsible for any injuries whether they be mental and/or physical resulting from this presentation and/or experiments done based on the information in this presentation
What gives a flame its teardrop shape?
The teardrop shape is affected by gravity. What happens, is the cool air is denser, so gravity pushes it down. The hot air is less dense, so therefore, the hot air rises. The rising hot air from the candle leaves a vacuum behind for the fresh cool air to flow in. This is called buoyancy.
If gravity gives a flame form, what does a flame in space do?
Hot air
Cool air
In outer space, the flame forms into a sphere shaped figure. The flame is different in microgravity, in the respect towards how it gathers oxygen. On earth, flames expand when they need more fuel. In microgravity, however, the flames let the oxygen come to it (because the the air flows toward the flame to fill the vacuum caused by the consumed oxygen).
There are 4 main gasses caused by fire:

Straighten spindles and shafts, warmth, Enticing animals into a preferred direction (hunting), Changing the landscape (farming, coppicing), rendering food edible, water purification, cauterizing wounds, removing seed chaff, modifying wood, stone and bone for use as tools/handles, soften materials to bend and to make easier to modify with tools, hardening the points wooden tools/weapons, melting hardened substances for use


Communication at distance, waterproofing tanned hides, food preservation, repel insects, food preserver


Charcoal for easier future fire building, mineral paint, medicine, salt, toothpaste


Seeing in the dark, communication at distance, keeping animals out of camp, psychological security

What exactly makes the gasses?
Pyrolysis: When the fuel turns into gas
Chemiluminescence: When the atoms rearrange and give off blue light
Incandescence: When particles give off light because they're hot
Oxidation: When oxygen atoms combine with other atoms to create new molecules
Cauterize: To burn the skin around a wound to stop bleeding or destroy infected tissue
Carbon dioxide forms when the carbon in the soot combines with the oxygen in the air.
Hydrogen Chloride forms when you burn PVC and other chlorine containing plastics.
Carbon monoxide is created when there isn't enough oxygen for carbon dioxide to form.
Hydrogen Cyanide forms when the fuel source contains hydrogen and nitrogen.
Hope you enjoyed!


Presented by:
Andrew Tevan Cota, and Simon Tran

If that gave you a heart attack, we're sorry (not really), but we don't offer compensation
Full transcript