Notice the smoke is flowing toward the ceiling. 

Changing temperature affects the volume of gases. 
Hot smoke takes up more space (volume). 
It is less dense. 
Less dense smoke rises. 

What will happen when the smoke reaches the ceiling? 

Click the next hotspot to find out.

Notice the smoke spreads out once it reaches the ceiling. 

Less dense gas floats above the other gases in the room.

What do you think will happen once the smoke reaches the wall? 

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Notice the black smoke fills the top of the room. 

The oxygen in the room is decreasing.

What do you think happens once most of the oxygen 
is used by the fire? 

Click the next hotspot to find out.

Notice a fire has started at the ceiling.

Unburned fuel is in the smoke.
Heat is from the fire below.
Oxygen is in the room.
Heat, fuel, and oxygen result in fire.

What part of the fire triangle do you think will run out first?

Notice the dark smoke has filled the entire room. 

The fire has used most of the oxygen in the room. 
The flames will go out without enough oxygen.
The fuel and oxygen have been converted to new products.
These products are carbon particles (soot),
carbon monoxide gas and other dangerous gases.