Ice skates
device · 3000 BC · Ancient world
A blade on a shoe for gliding on ice.
What it is made of
- Skate blade — has part. A steel blade.
- Skate boot — has part. A boot.
Principles and materials it uses
- Friction — uses. Very low friction on ice.
- Steel — is made of. A steel blade.
- Bone — is made of. The first skates were horse bones with a polished side.
History: what it evolved from and what it influenced
- Roller skates — evolved into. Skates for dry land.