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Fireworks!
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Classroom Activity
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Objective
To trace the evolution of various aspects of fireworks from their
invention to today.
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copy of "History of Fireworks" student handout (PDF
or
HTML)
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Fireworks have been around for more than 1,000 years. To help
students understand how they have evolved, have students
investigate their invention and use over time.
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Organize students into five groups and distribute the "History
of Fireworks" student handout to each student. Assign students
in each group to take notes on the evolution of fireworks in the
following areas as they watch the program:
- the time period over which they have been used
- the chemistry involved
- the techniques used
- the type of use
- the frequency of use
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After students watch, have each group conduct additional
research on its assigned topic. Have group members synthesize
their information on one page.
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Have the time period group create a relative scale timeline of
the period in which fireworks have been used, starting with the
use by the Chinese, and following through to Renaissance,
Victorian, and modern-day uses. The timeline should be large
enough for the other groups to add their information.
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Have each group add its information to the timeline and, when
all groups are done, have each group present its information.
After all groups have presented, discuss with students what
occurred during each phase of the timeline. What are the major
ways in which fireworks have changed over the course of their
history?
The chemistry of fireworks has remained basically the same since
their discovery. Gunpowder, which is the basis of many fireworks, is
supplemented with metal powders to create sparky effects. The three
basic ingredients are potassium nitrate (75 percent), charcoal (15
percent), and sulfur (10 percent). Saltpeter enhances the flame. A
propellant is used to launch the fireworks into the sky.
The Chinese are credited with discovering fireworks by creating a
mixture of charcoal, sulfur, and saltpeter that would explode if
enclosed in a small place. The Chinese would use firecrackers to
scare away evil spirits. In medieval times, when people spent most
of their time in the dark, people were fascinated by the sparks and
explosions that created light. During the Renaissance, the military
was responsible for both war artillery and for fireworks used during
peacetime. In 1575, the Earl of Leicester hosted Elizabeth I and
capped a multi-day feast with fireworks. Rulers would often use
fireworks in ceremonies to prove they could create magic for their
subjects. In the 1730s, fireworks went from being used for dramatic
purposes to more common uses.
It wasn't until the 1830s that pyrotechnicians learned how to add
color to fireworks. Replacing potassium nitrate with potassium
chlorate, an energetic oxidation agent, raised the combustion
temperature of the fireworks to 2,000 degrees C (3,632 degrees F),
allowing for a wider range of colors to be used. Colors are created
by adding metal salts to the mixture. Each metal salt produces light
in a specific wavelength (sodium salts create yellow; copper salts,
blue; strontium nitrate, red; barium nitrate, green; charcoal or
other form of carbon, orange). Pyrotechnicians are now trying to
figure out how to create letters. Modern-day uses range from small
to large celebrations. State laws vary concerning the type of
fireworks allowed; some states allow none.
Book
Lancaster, Ronald, Roy E. A. Butler, J. Mark Lancaster, Takeo
Shimizu, and Thomas A.K. Smith.
Fireworks: Principles and Practice.
New York: Chemical Publishing Company, 1998.
Opens with a world history of the manufacture and display of
fireworks.
Web Sites
NOVA Online—Fireworks!
http://www.pbs.org/nova/fireworks/
Provides program-related articles, interviews, interactive
activities, resources, and more.
Fireworks and Pyrotechnics
http://chemistry.about.com/cs/fireworks/
Links to several sites about the chemistry and physics of making
fireworks. Includes links to the chemistry of firework colors, the
science and history of fireworks, and a description of some 150
chemicals used in pyrotechnics and explosives.
Fireworks: The Science Behind the Spectacle
http://library.thinkquest.org/15384/
Offers the history of pyrotechnics, the chemistry of fireworks, the
physics of fireworks, and the construction of fireworks.
Rocket History
http://www.grc.nasa.gov/WWW/K-12/TRC/Rockets/history_of_rockets.html
Explains how rockets were developed in tandem with or as derivatives
of fireworks.
The "History of Fireworks" activity aligns with the following
National Science Education Standards:
Grades 5-8
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Science Standard G: History and Nature of Science
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History of Science
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In historical perspective, science has been practiced by many
different cultures. In looking at the history of many peoples,
one finds that scientists and engineers of high achievement are
considered to be among the most valued contributors to their
culture.
Grades 9-12
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Science Standard G: History and Nature of Science
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Historical Perspectives
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In history, diverse cultures have contributed scientific
knowledge and technological inventions. Modern science began to
evolve rapidly in Europe several hundred years ago. During the
past two centuries, it has contributed significantly to the
industrialization of Western and non-Western cultures. However,
other, non-European cultures have developed scientific ideas and
solved human problems through technology.
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Fireworks! Lifting Charge
Discover in this Teachers' Domain
video segment
(2m 15s) how pyrotechnicians load and fire these magnificent
displays.
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