[2015] Maggie S: Stop drop and roll

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by galejandrino12
Last updated 4 years ago

Discipline:
Science
Subject:
Chemistry
Grade:
8

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[2015] Maggie S: Stop drop and roll

STOP DROP AND ROLL

by maggie, mckenna, and brooke

There are a lot of different compounds in smoke such as water vapor (which makes up the majority of smoke), hydrogen, carbon and oxygen. Smoke is also made of hot air and ash.

Hot air rises because it is less dense than cold air. Molecules in cold air have less energy and are more compact compared to hot air so cold air sinks. Heated air has more energy so it has a greater volume.

Smoke rises because it is less dense than the surrounding air. However, many of the compounds in the smoke are not less dense. The compounds still rise because the hot air in the smoke rises and carries the ash and other compounds and helps them to float.

Smoke is very bad to breath in especially when you are stuck in a fire. Your lungs can be damaged with diseases such as lung cancer and chronic bronchitis . All smoke contains carbon monoxide, which decreases the body's supply of oxygen. This can give you heart conditions such as cardiovascular disease,and strokes which are life threatening. So, when there is fire, get out as quick as possible so you don't have to breath in smoke.

Ash can't burn because the materials in ash are non-flammable and have already been oxidized (burned). When something burns, what is being burned its mostly converted to CO2 (carbon dioxide) and H2O (water) which leaves the fire as a gas. The ash was the small amount of material that can't leave as a gas becauses it has non-flammable materials. So, ash is basically what is left over from a fire after it has burned.

Ash is mostly made of calcium carbonate (usually 25%-45%). Under 10% of the ash is potash, less than 1% is phospate. There also may be traces of iron, manges, zinc, copper and other metals.

When you are on fire you should stop drop and roll because hot smoke rises this will make the floor less heated and easier to breathe. Running away from the fire creates an oxygen flow which fuels the fire, this is why you "drop." You want to rollbecause you want to extinguish the fire by depriving it of oxygen.


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