the National Science Foundation
the WGBH Educational Foundation
This video package illustrates the hazard of dust explosions--specifically, how a material that is not generally flammable suddenly becomes combustible when its surface area is increased. The featured chemical is lycopodium powder, which is not especially flammable in normal circumstances. But disperse it into the air, bring a flame close by and.....KABOOM. (Video may be viewed in slow motion.)
Please note that this resource requires
Editor's Note: When a substance rapidly reacts with oxygen, energy is released in the form of heat and/or light. This type of exothermic reaction is known as combustion. This resource will be especially useful in helping students see that many factors can affect combustion: temperature, the concentration of the reactants, and surface area of the fuel.
Metadata instance created
June 27, 2011
by Caroline Hall
August 22, 2016
by Lyle Barbato
Last Update when Cataloged:
December 29, 2008
AAAS Benchmark Alignments (2008 Version)
4. The Physical Setting
4D. The Structure of Matter
6-8: 4D/M6b. An important kind of reaction between substances involves the combination of oxygen with something else—as in burning or rusting.
6-8: 4D/M11. Substances react chemically in characteristic ways with other substances to form new substances with different characteristic properties.
9-12: 4D/H7b. An enormous variety of biological, chemical, and physical phenomena can be explained by changes in the arrangement and motion of atoms and molecules.
9-12: 4D/H9a. The rate of reactions among atoms and molecules depends on how often they encounter one another, which is affected by the concentration, pressure, and temperature of the reacting materials.
4E. Energy Transformations
9-12: 4E/H4. Chemical energy is associated with the configuration of atoms in molecules that make up a substance. Some changes of configuration require a net input of energy whereas others cause a net release.
%0 Electronic Source %D December 29, 2008 %T PBS LearningMedia: Dust Explosion %I WGBH Educational Foundation %V 2016 %N 23 October 2016 %8 December 29, 2008 %9 application/flash %U http://www.pbslearningmedia.org/resource/lsps07.sci.phys.matter.expldust/dust-explosion/
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