What earth materials is a car made of?
all steels start as iron ore
In the past (quite a long time ago!) most car manufacturers actually made all the parts that went into the car, so they bought metal, plastic, wood, etc, and then made parts out of these materials, then made a car with the parts they had made. These days most car companies buy parts made by other companies, and then "assemble" the parts into a car. So they no longer "manufacture" a car, they "assemble" it.
The four materials that classically made up the universe were earth, wind/air, fire and water. Of course, today we recognize that these are each made up of much smaller elements called atoms. The four elements that make up most of the earth are iron, oxygen, silicon, and magnesium. Of course, many other elements are contained in the earth as well, such as gold, silver, nickel, and aluminum.