2. The second industrial revolution was marked by WHAT?

the Second was characterized by the build out of railroads, large-scale iron and steel production, widespread use of machinery in manufacturing, greatly increased use of steam power, widespread use of the telegraph, use of petroleum and the beginning of electrification. It also was the period during which modern organizational methods for operating large scale businesses over vast areas came into use.

The Second Industrial Revolution, otherwise called the Technological Revolution, was a period of fast institutionalization and industrialization from the late nineteenth century into the mid twentieth century