Firecrackers: Exploring How They Work and Proper Usage

The video tutorial explains the structure and usage of firecrackers, detailing their chemical composition, which includes black powder made of potassium nitrate, charcoal or sugar, and sulfur. It describes the reaction process leading to an explosion, highlighting the role of each component. The tutorial emphasizes the importance of safety precautions, advising that firecrackers should be used under controlled conditions and never modified. It warns of potential damage if misused.

What is the initial step in using a firecracker?

• Hold it in your hand

• Place it on the ground

• Dip it in water

• Throw it in the air

Which ingredient in black powder acts as an oxidizer?

• Sulfur

• Charcoal

• Sugar

• Potassium nitrate

What happens when the gases inside a firecracker expand?

• The firecracker melts

• The firecracker bursts apart

• The firecracker shrinks

• The firecracker changes color

What is a visible effect of a firecracker explosion?

• The firecracker becomes invisible

• The firecracker turns to dust

• A rainbow appears

• A cloud of black smoke

Why should firecrackers not be modified before use?

• They become more colorful

• They may not explode

• They can cause serious damage

• They become heavier