What is a magnetometer used for?
How is it used? What iron product is used to make buildings, machines and vehicles? Iron Color: Gray-white or steel-gray Weight: Almost 8 times the weight of water Found: Mixed with other minerals, never in pure deposits Iron is the second most common metal on earth. The earth s crust contains about 5% iron, and many scientists believe that the center of the earth consists of (contains) large amounts of iron. In ancient times, iron was the strongest and hardest metal people knew of. After they learned to melt and shape it, people used iron even more than bronze and copper. Iron has been an important mineral for a long time, and is still one of the most useful minerals. Iron ore is heavy and its surface can be rusty-colored. The rust is formed when certain types of iron combine with oxygen in the air. Iron ore is never pure, which means there is always a lot of waste material to get rid of when it is mined. The largest deposit of iron in the United States is in Minnesota, in the Mesabi
