known facts about crackers

1. FIREWORKS
-Vairamuthu J

2. Characteristics
 Low expensive pyrotechnic .
 Entertainment purpose.
 Display of effects.
 produce noise , sound, smoke.
 burn with colored flames and sparks.
 focal point of many cultural and religious celebrations.

4. History
 Fireworks dates back to 7th century China during the time of
the Tang Dynasty
 Royal Fireworks display on the Thames London, 1746
 18th-century Chinese fireworks French Jesuit
 Large fireworks display entertain Emperor Huizong in 1110 -
1125.

5. Cont…
 A Syrian named Hasan al-Rammah wrote of rockets, fireworks
 In China it was considered as "Chinese flowers".
 Music by Royal Fireworks by George Handel in 1749 .

6. Culture
 Halloween - U.S.A,Ireland
 Diwali- India
 Eid al-Fitr - Southeast Asia
 Bonfire Night - United Kingdom
 Bastille Day - France
 Chinese New Year – Chinese all the world

8. Types of fire works
 Flower pots or fountains.
 The Ground Spinner.
 Sparkles.
 Rockets.
 Parachutes.
 Snakes.
 Wees.
 Cakes.

9. How fire works are
made?
Excitation and de-excitation of electrons present in the atoms of salts

10. Major salts used for fire works
 Barium salts - Green
 Calcium salts - Orange
 Potassium salts - Violet
 Sodium salts - Yellow
 Lithium salts - Red
 Strontium salts - Red
 Copper salts - Blue

11. Safety
 Fireworks pose risks of injury to people, and of
damage, largely as a fire hazard

12. Thank you…