Knife

device · 2500000 BC

A blade with a handle; the oldest cutting tool.

What it is made of

• Steel blade — has part. A blade with a cutting edge.
• Handle — has part. A handle.
• Tang — has part. The part of the blade fixed in the handle.

Principles and materials it uses

• Wedge — uses. The blade cuts like a wedge.
• Steel — is made of. Modern knives are steel.

Where it is used

• Cutlery — is part of. Knives.
• Meat grinder — is part of. A cross-shaped blade.
• Overlocker — is part of. A knife for trimming the edge.

History: what it evolved from and what it influenced

• Stone tool — evolved from. The first knives were stone flakes.
• Scalpel — evolved into. A surgical knife.

Take Knife apart

Open Evothings