2. What are fireworks?
• explosive device for producing a striking display of
light or a loud noise, used for signaling or as part of a
celebration
• pyrotechnic display
• Many fireworks are used in 4th of July
• http://www.youtube.com/watch?v=QGJuMBdaqIw
3. • There are three basic types of fireworks:
firecrackers, sparklers and aerial fireworks.
• Firecrackers consist of gunpowder and a fuse
wrapped tightly in a paper tube.
• Sparklers are made of fuel, an oxidizer, binder, and
iron or steel powder.
• The fuel is usually charcoal. The binder is sugar or
starch.
• The fuel and binder are mixed with water and
poured into a form or a wire is dipped into it. When
it dries, it is ready to light.
5. Who invented fireworks and when?
• 7th century
• in China
• Fireworks were made to scare away Chinese
demons
6. Where are they mostly used?
• Celebrations
• 4th of July
• X-mas eve
• Soccer matches
• Music events
• Presentations
• In movies
• Grand openings
7. How do they change colors
• The colors that you see in the sky are determined
by metal salts that are deliberately added in very
small amounts to the stars when they are
manufactured.
As the stars burn the metal atoms absorb
energy, become excited and emit a specific color of
light. Some of the metals that produce the colors of
fireworks are tabulated here.
8. Are they dangerous?
• fireworks are not dangerous
• the only reason there is a perception of
danger is due to media distortions
9. How much do they cost?
• A 15-minute show for family and friends - which
will include some fountains and cakes and artillery
shells - will cost approximately $500 to $1,000.
•
