fireworks imani josh

Fireworks

Fireworks

http://blog.positscience.com/wp-content/uploads/2013/07/petoskey-fireworks.jpg

Parts of a Firework

Break: A container with 2 compartments each holding a bursting charge

Time delay: A fuse that slowly burns all the way through the firework causing each part to explode separately

Stars: Stars that explode in a single firework

Parts of a Firework

Black powder: The basic material inside a firework

Launching tube: The tube that holds the mortar and the firework

Fuse: Wire that connects with Lift charge

Lift Charge: Charge that gets the firework in the air

Chemical Reactions

Potassium chlorate and gun powder makes an energetic source of oxygen causing the temperature to rise

Black powder and a fuse make an explosion which releases gas

The Chemical reaction in stars is caused by black powder and a special substance which gives off light and heat

http://static.wixstatic.com/media/2e795f_aae62500ba6729ae5a2b1854e9027f04.jpg_srz_828_1024_85_22_0.50_1.20_0.00_jpg_srz

The elements and compounds that make up the colors

Sodium = yellow

Calcium = orange

Strontium + lithium = red

Barium = green

Copper = blue

Strontium + copper = purple

Magnesium = white

Titanium = silver

http://www.philipsperfectcolors.com/blog/wp-content/uploads/2009/07/fireworks.bmp

History of Fireworks

The chineese were the first to make fireworks 1000 years ago.They developed firecrackers and rockets from sulfer, charcoal and potassium nitrate.Fireworks were used for scaring away spirits and were dull in color

Marco Polo brought fireworks to Italy resulting in Italy becoming the capital of fireworks.

History of Fireworks

In the 1800s fountains ,wheels and images of fireworks were made. After the Industrial age the understanding of fireworks was better.

Many children died after fireworks were brought to the public and introduced to the kids. 4000 of them died every year until 1910 - 1914 new laws were passed

In 1980 there were more electronically fired fireworks

Designs

The Palm design has cylinders traveling up and then exploding curving downward like palms.

The Chrysanthemum design has a spherical patteren leaving a trail behind it.

http://www.popularmechanics.com/cm/popularmechanics/images/fireworks_11_0710-lg-72262896.jpgThe Roundel design has a circle of maroon shells exploding in a sequence.

Sounds

The Bang of a Firework is caused by a strong case around the shell so that when it explodes a bang is released

The whistle sound is made by leaving a drilled hole in the bottom of the shell

http://expressmilwaukee.com/imgs/hed/art2661widea.jpg

Safety Tips

Dont sit too close to the fireworks display to avoid ear damage

Keep fireworks away from pets

Get an Adult to launch bigger fireworks

http://www.mysecuritysign.com/img/lg/K/No-Pets-symbol-Sign-K-7319.gif

Safety Tips

For people making fireworks there are also rules that they must follow:-

Wear ear protection incase something goes off

Never experiment with the fireworks without supervision

http://greenstateservices.com/images/products/detail/SoundOutEarMuffs.jpg

Sources

http://science.howstuffworks.com/innovation/fireworks.htm

Fireworks Vicki Cobb

Fireworks raintree fusion

Modern marvels

Nova

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