Scientists use meteorites that hit earth to provide evidence of the composition of earth’s interior because they hypothesize that

meteorites are made of the same material as peridotite and lava

meteorites have the same p and s wave speeds as rock samples

meteorites are made of the original material from which earth formed

meteorites contain a smaller percentage of iron than earth’s crust

meteorites are made of the original material from which Earth formed

Explanation:

Meteorite is a fragment that passes through the earth's atmosphere and strikes the earth.

It is a metallic or stony body which is able to enter the earth.

Meteorites are widely believed to have formed with the earth when the solar system and other planets formed. They contain records of the earth's original composition. This is the main reason why they are suitable for radioactive dating. Example is the Stony Antarctica meteorites. Some of these meteorites have preserved their original composition.

Meteorites can be classified as stony, iron and stony-iron.

Some special set of meteorites contains lumps of materials that are thought to have formed first. These lumps are called chondrules. Meteorites with chondrules are called chondrites. These chondrules are rich in radioactive minerals and are very suitable for dating the earth.

Some meteorites also contain some black carbon matter that has been analysed to be amino acid. This has been very useful in understanding how life formed on earth. It provides an exotic origin of life on earth. These types of meteorites are called carbonaceous meteorites.

A good meteorite for dating would be one that is still very intact and has not weathered. Weathering affects the effectiveness of using earth materials for dating.