USA HISTORY

Detailed explanation-1: -It was obtained by heating coal in the absence of air. The materials were now cost efficient and sufficient in supply. The result of this change revolutionised the industry and the use of iron and steel.

Detailed explanation-2: -The availability of cheaper iron and steel was fundamental in the growth of several industries. The development of machine tools made precision iron working possible. Other changes included improved roadways, waterways and railways. Raw materials and finished products could be moved more quickly and cheaper than ever.

Detailed explanation-3: -An abundance of raw materials was one reason for the nation’s industrial success. The United States had vast natural resources, including timber, coal, iron, and copper. This meant that American companies could obtain resources cheaply and did not have to import them from other countries.

Detailed explanation-4: -Iron making The Industrial Revolution could not have developed without coal and iron. Coal was needed to make steam engines run and to produce iron. At the beginning of the 18 th century iron makers found a way to extract pure iron out of iron ore.

Detailed explanation-5: -The Second Industrial Revolution By 1870, Bessemer steel was used for building ships and railways. It was especially useful for railroads, as it could hold heavier and faster engines and cars. At the same time, factories were becoming more productive due to the increase in mechanization.