Bulldozer is an earth-moving machine. It consists of a large, steel blade attached to the front of a tractor. The term is also used to mean the blade alone. The blade is mounted on a tractor that has either large rubber tires or endless tracks like those of a tank. The driver can raise or lower the blade with a power control. Bulldozers first appeared in the early 1900’s. Today, they range widely in size and power. Bulldozers are major tools for landscaping, mining, and a wide variety of construction projects.
