1. Explique con sus propias palabras el concepto de Historia. 2. ¿Para qué cree usted que sirve estudiar o conocer la historia?
3. Cuando debemos medir el tiempo histórico, que es el tiempo de los grandes procesos de la humanidad, utilizamos unidades de tiempo extenso y prolongado. Estas unidades de tiempo son convenciones o acuerdos desarrollados para organizar la comprensión del tiempo.

by 1880, germany had more rail lines than great britain and russia.

the outcome of 1970 oil crisis in united states was that, they began to search ways on how to reduce oil.

in 1970 was a period when there were energy and oil crisis. those who were major centers for industrialization were forced to keep way from supplying of petroleum.

some of the result of this crisis was economic growth became stagnant because prices of oil surged.

due to the increased prices some countries like mexico and norway benefited.