Smoke grenade

A smoke bomb or smoke grenade is a bomb that produces a cloud of smoke. It can be used as a toy to make large clouds of colored smoke.  

Military smoke bombs are used to hide positions and objects from sight behind a thick cloud of smoke.  Armies also use smoke grenades to hide soldiers from the enemy.  Smoke grenades can be used to mark a spot on the ground (for example, a spot where you want a helicopter to land).  Smoke bombs can be thrown or shot. They normally contain a powdered chemical.  When ignited, it produces a large cloud of smoke quickly.  Then something else starts burning, keeping the smoke cloud thick. 

Related pages
Grenade
Bomb

Category:Toys
Category:Weapons
Category:Law enforcement equipment