causes of fireworks in air?

Answer 1

Humans set fire to explosives that are driven by the force of the action of the fuse into the sky and when the fuse (I'm not sure how this works, it just does) reaches the explosives package it bursts into the display we call fireworks.

The are a reminder of the sacrifices made by those who gave their lives so that we could be independent and whose who continue to sacrifice to keep us free.

Answer 2

er, perhaps you wish to know what casues fireworks to look how they do in the air?

Well, each firework is different, but here is a simplified explination.

We'll talk about display fireworks to simplify things. A 'shell' - a round or clyndrical paper containe is loaded into a 'mortar', a steel tube held in place in a trough of sand. In this mortar there is a charge of lift powder ( granulated black powder) under the shell. This charge is ignited electronically.

In the shell its self, there is a center, and stars.

The center is made of black powder, normally coating rice hulls or corn cob pieces (creating more surface area). This charge is called the 'break', and detonates at on near the apogee of the shell's flight via a time fuse.

The stars are what give the fireowrks its color. They can be cut, like cookies, or rolled over a lead ball, like a bb. Certain chemicals in the star composition give different colors.
strontium salts, lithium salts = red
lithium carbonate, Li2CO3 = red
strontium carbonate, SrCO3 = bright red
calcium salts
calcium chloride = orange,
CaCl2 = orange
calcium sulfate, CaSO4·xH2O, where x = 0,2,3,5 = orange
Gold incandescence of iron (with carbon), charcoal, or lampblack
sodium compounds = Yellow
sodium nitrate, NaNO3 = Yellow
cryolite, Na3AlF6 = Yellow
white-hot metal, such as magnesium or aluminum = Electric White
barium oxide, BaO = Electric white
barium compounds + chlorine producer = green
barium chloride, BaCl+ = bright green
copper compounds + chlorine producer = blue
copper acetoarsenite (Paris Green), Cu3As2O3Cu(C2H3O2)2 = blue
copper (I) chloride, CuCl = turquoise blue
mixture of strontium (red) and copper (blue) compounds = Purple
burning aluminum, titanium, or magnesium powder or flakes= Silver

These stars contain oxidizers, that is chemicals that release o2 when they burn, fueling the reaction. Examples - KNO3, KMnO4, KClO4, etc

They also contain a binder - normally dextrin.

Shapes are created by the shape of the shell in addition to the arrangement of stars within the shell.
I hope that helps

Answer 3

Fireworks are a great example of Chemistry!

The different colors are caused by the excitation of metals (contained within the firework). When the electrons of these substances demote to their lower energy levels, energy is released in the form of light!

You can figure out what metals are in each color by doing simple flame tests in your high school chem lab. Copper is green/blue. Sodium is red/orange. And the list goes on!

Answer 4

Aerial Fireworks
An aerial firework is normally formed as a shell that consists of four parts:
Container - Usually pasted paper and string formed into a cylinder
Stars - Spheres, cubes or cylinders of a sparkler-like composition
Bursting charge - Firecracker-like charge at the center of the shell
Fuse - Provides a time delay so the shell explodes at the right altitude
Located just below the shell is a small cylinder that contains the lifting charge.

These are small shells, about the size of a peach, that you can buy at roadside stands in some states. The sphere is the shell, and the small cylinder below is the lifting charge that shoots it out of the launch tube. The green fuse lights the lifting charge, which in turn lights the shell's fuse. Shells that you see at a show are typically the size of a cantaloupe or even larger.



The shell is launched from a mortar. The mortar might be a short, steel pipe with a lifting charge of black powder that explodes in the pipe to launch the shell. When the lifting charge fires to launch the shell, it lights the shell's fuse. The shell's fuse burns while the shell rises to its correct altitude, and then ignites the bursting charge so it explodes.


A simple shell used in an aerial fireworks display. The blue balls are the stars, and the gray is black powder. The powder is packed into the center tube, which is the bursting charge. It is also sprinkled between the stars to help ignite them.



Simple shells consist of a paper tube filled with stars and black powder. Stars come in all shapes and sizes, but you can imagine a simple star as something like sparkler compound formed into a ball the size of a pea or a dime. The stars are poured into the tube and then surrounded by black powder. When the fuse burns into the shell, it ignites the bursting charge, causing the shell to explode. The explosion ignites the outside of the stars, which begin to burn with bright showers of sparks. Since the explosion throws the stars in all directions, you get the huge sphere of sparkling light that is so familiar at fireworks displays.

Multibreak Shells
More complicated shells burst in two or three phases. Shells like this are called multibreak shells. They may contain stars of different colors and compositions to create softer or brighter light, more or less sparks, etc. Some shells contain explosives designed to crackle in the sky, or whistles that explode outward with the stars.

Multibreak shells may consist of a shell filled with other shells, or they may have multiple sections without using additional shells. The sections of a multibreak shell are ignited by different fuses. The bursting of one section ignites the next. The shells must be assembled in such a way that each section explodes in sequence to produce a distinct separate effect. The explosives that break the sections apart are called break charges

POLLUTION:
Fireworks Contribute to Environmental Pollution
The chemicals and heavy metals used in fireworks also take their toll on the environment, sometimes contributing to water supply contamination and even acid rain. Their use also deposits physical litter on the ground and into water bodies for miles around. As such, some U.S. states and local governments restrict the use of fireworks in accordance with guidelines set by the Clean Air Act. The American Pyrotechnics Association provides a free online directory of state laws across the U.S. regulating the use of fireworks.

Fireworks Add to Worldwide Pollution
Of course, fireworks displays are not limited to U.S. Independence Day celebrations. Fireworks use is increasing in popularity around the world, including in countries without strict air pollution standards. According to The Ecologist, millennium celebrations in 2000 caused environmental pollution worldwide, filling skies over populated areas with “carcinogenic sulphur compounds and airborne arsenic.”

Disney Pioneers Innovative Fireworks Technology
Not usually known for championing environmental causes, the Walt Disney Company has pioneered new technology using environmentally benign compressed air instead of gunpowder to launch fireworks. Disney puts on hundreds of dazzling fireworks displays every year at its various resort properties in the U.S. and Europe, but hopes its new technology will have beneficial impact on the pyrotechnics industry worldwide. The company has made the details of new patents it has filed for the technology available to the pyrotechnics industry at large with the hope that other companies will also green up their offerings

Answer 5

Are you asking about EFFECTS of fireworks? Fireworks cause light and sound pollution and put a number of chemicals into the air that are potentially harmful to aquatic, marine, and terrestrial organisms.

They are toxic and harmful for two reasons: 1) the chemical form of some components, and 2) the concentration of them. Components that are potentially harmful are nitroglycerates, sulfur and its compounds. Some components are potentially beneficial, because of the useable form of nitrogen to plants another organisms, such as ammonium nitrates.

Answer 6

If you are asking about a natural occurrence of lights in the sky, then perhaps you are asking about the 'northern lights' that are sometimes observed at dusk or at night in northern latitudes. These are called the 'aurora borealis' (boreal being Latin for north). There are similar phenonema in the high southern latitudes, called aurora australis (austral being Latin for south). They are caused by fast-moving charged particles travelling from the sun reacting with atoms in the very high atmoshere, causing them to emit light. The reaction ocurrs near the earth's magnetic poles, and hence the auroras are seen most often in the high latutudes.

Answer 7

Celebration

Answer 8

people on the ground lighting fireworks.

Answer 9

it was 4th of july so ppl r excited and lite fireworks

Answer 10

Is a fruit car in hibernation if it germinates in the back yard under my bed?

Which question makes more sense...yours or mine?