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Tag Archives: combustion
Potato Candle Demo
In this demonstration, a peeled potato is cut into the form of a candle and an almond slice is used as the candle’s “wick.” The teacher lights the almond slice on fire and it burns. The students see the object, and make observations about it. Continue reading
Sandwich Bag Fire Starter
Grant Thompson – the King of Random – teaches me how to start a fire with a Sandwich bag. And we tried to melt glass in my backyard Continue reading
Teacher Demo/Student Activity: Powder Disaster
Introduction
Flour is an ingredient that is found in most kitchens and used regularly for baking and cooking. Consequently, it is considered safe, and people do not regard the potential hazards. In reality, flour and dust explosions are extremely dangerous, and reducing the risk of such an explosion is a major concern to the agriculture and food processing industries.
The purpose of this demonstration/activity is to illustrate the importance of being aware of potentially harmful situations and practices in the workplace. In particular, the dustiness of a material can affect the nature of chemical reaction, affecting a safe working environment.
How does it work?
Flour is combustible. When sitting as a stable pile the fuel (flour) is more connected to other flour particles than oxygen particles. As dust, each dust particle is surrounded by oxygen particles. This supports the combustion of the flour particle. As each particle moves through the flame, the combustion moves with the particles. Flour explosions tend to be connected to the movement of flour through air. The source of ignition is often discovered to be a static discharge.
Exploding Egg – Cool Science Demo by Steve Spangler
Most people don’t need matches, safety glasses and hydrogen gas to crack open an egg. But then again, Steve always finds the most unusual method to do the simplest things. Don’t try this at home. Continue reading
5 weird ways to put out a candle
What happens when you pour liquid nitrogen on a flame? What about when you blow on the flame with a cup in the way? Try these five unusual ways to extinguish a candle. Pour out the flame with CO2. Cut off the oxygen supply to the flame without fully covering it. Snuff out the flame with a coil of copper wire, and when it appears dead, it will amazingly come back to life!
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Canada Q&A: Can you light a match on the moon? A quick study of the science of fire
The Globe and Mail’s science reporter, Ivan Semeniuk, explains how fire works in space. This video is a part of a series called, Canada Q&A: Globe journalists answer your questions – from wine to politics to sports and everything in between
Can you light a match on the moon?
Can you light a match on the moon? The answer isn’t as obvious as you may think. Click on this link to find out.
