To ignite a reaction.
well you can get gunpowder from creepers but YOU need to kill it. if it explodes trying to kill you you wont get gunpowder. you need gunpowder to make TNT's and a potion but i forgot which potion. try it yourself. hope i helped.
You need four sand and five gunpowder arranged like this: GSG SGS GSG
5 Gunpowder and 4 Sand
String tripwire cord and Gunpowder!
It does have TNT, to light it right click with flint and steel or connect it to power, to get flint and steel you need to craft it like this: Nothing : Nothing : Nothing Iron Ingot : Nothing : Nothing Nothing : Flint : Nothing To craft TNT: Gunpowder : Sand : Gunpowder Sand : Gunpowder : Sand Gunpowder : Sand : Gunpowder (Obtain gunpowder from creepers, ghasts, or dungeon chests.) (Obtain sand from breaking sand with fists or any shovel.)
In Poptropica's Time Tangled Island, you can find the gunpowder in the Revolutionary War time period. After entering the era, look for the blacksmith's shop, where you'll find a barrel of gunpowder located to the right of the building. You will need to help the blacksmith by retrieving the gunpowder to progress in the quest.
You need any firework star, paper and gunpowder to create a firework rocket. To create a firework star you need gunpowder, any dye and an extra ingredient (optional). Arrange these items in a crafting bench
They served as cannons before gunpowder came along.
an ingredient in gunpowder is sulphur
saltpeter + sulfur = gunpowder. Hope this helps.
You need to put it in front of the cave and then click on it.
You need sand and gunpowder, crafted like this: S G S G S G S G S S = Sand G = Gunpowder