Las materias primas

1.1. Las materias primas naturales Para elaborar un producto industrial son necesarias las materias primas naturales. Estas materias primas se encuentran en la naturaleza y, debidamente transformadas en…

Actividades finales - Transición y democracia en España

En 1975, tras la muerte del dictador Francisco Franco, se inició en España la transición a la democracia, que devolvió la soberanía al pueblo español e instauró una monarquía constitucional y…

Los medios de comunicación

Think about it. Trophic relationships in ecosystems

Remember what you have studied in this section and answer the questions: Are feeding relationships intraspecific or interspecific? Explain your answer. Why can there only be four or five trophic levels?…

Complete. The table

Complete the table:

Learn. Risks from volcanoes - Energy inside the Earth

Volcanic eruptions can cause loss of human life and material damage. This can be because of the material ejected from the volcano or as a consequence of the seismic activity which usually accompanies…

Answer. Forces

Look at the different formulas and answer the questions: Which forces have the same meaning as F1? Which forces have the same magnitude as F1? Which forces have the same direction as F1?

Check. The reflection of sound

Remember what you have studied in this section and answer the questions: What is the reflection of sound? Explain an echo. Why is a minimum distance needed to hear it?

The Napoleonic period (1799-1815)

4.1. Napoleon: from consul to emperor In 1799 Napoleon was named consul, which saw the end of the Directory and the beginning of rule under the Consulate (1799-1804). This was a period of autocratic and…

Complete. Liberal agricultural reform

Complete the sentences with the missing words: agricultural reform was made up of a series of changes related to land ownership. The aim of the agricultural reform was to dissolve the and introduce to…