A thin pointed piece of metal is commonly referred to as a "point" or "pointed end." These can be found on various objects such as nails, needles, or awls and are typically used for piercing or puncturing materials.
If the mark is in the skin it would be called a gouge or a cut. If the mark is in a regular spot, for example a piece of paper it would be called a puncture.
When an acid is placed on a piece of metal, a chemical reaction occurs where the acid reacts with the metal to form a salt and release hydrogen gas. This reaction is known as metal-acid reaction and can result in the metal deteriorating or dissolving depending on the type of metal and acid involved.
A piece of gold is called a gold nugget.
The oxide of a metal is called a metal oxide. It is a compound formed by a metal and oxygen atoms.
Burr or metal fragment
The metal part of a pencil is called a ferrule.
it is called a meteorite
Escutcheon
bit
Galley's
The definition of a shard is a piece of broken ceramic, metal, glass, or rock, typically having sharp edges. So with that definition, I would say that a shard of wood just means a piece of broken wood having sharp edges. If you are referring to the crossword puzzle hint, the answer is splinter.
The part that holds the eraser on is called "ferrule" and the part you write with is normally graphite, but sometimes is lead or charcoal.
The piece of metal is called a ferromagnetic material, and the phenomenon where it becomes magnetized when an electric current flows around it is known as electromagnetism.
The metal piece that holds the bulb in place is called a socket. It provides electrical contact to the bulb and secures it in position within the light fixture.
A thin pointed piece of metal is commonly referred to as a "point" or "pointed end." These can be found on various objects such as nails, needles, or awls and are typically used for piercing or puncturing materials.
Meteor.