The secondary sector transforms ____ into elaborated ____ in the workshops (talleres) and ____. Some examples of activities from the ____ sector are industry, crafts or ____. The Industrial Revolution started in ____ in the ____ century when the steam ____ was invented. Before the ____ Revolution, ____ dominated the economy and the artisans made products by ____. During the ____ phase, the invention of the steam engine resulted in the ____ of work. Many people moved from the countryside to the ____ to work in the ____. They were low-skilled (de baja cualificación) workers. During the second phase, in the 19th century, the train and the ____ (ferrocarril) were invented. The invention of ____ and assembly line (línea de montaje) resulted in ____ production in the factories. During the third phase, in the 20th century, there was a change to ____ technology. New energy sources appeared (solar and nuclear ____). Highly-skilled (altamente cualificados) ____ are needed to work with these technologies.

The secondary sector

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