Resúmenes - Transición y democracia en España

1. La transición democrática Tras la muerte de Franco en 1975, Juan Carlos I juró su cargo como Rey y dejó entrever su voluntad de promover un cambio político. Así, forzó la dimisión del…

Analiza. Fechas clave del mundo actual

Fíjate en el eje. Escoge cinco acontecimientos de las últimas décadas y elabora un breve comentario de cada uno. Justifica por qué han sido relevantes para la historia reciente mundial.

La gramàtica: morfologia nominal

The removal of cell waste

4.1. What does excretion consist of? Cell activity produces waste products like carbon dioxide or urea. These substances are toxic for the organism if they accumulate. The function of excretion is…

Work it out. Animal nutrition

Remember what you have studied in this section and answer the questions: Is it possible to find a digestive system that does not use mechanical processes? And chemical processes? Explain your answer.…

Learn. How to find out the age of a human foetus

The approximate age of a foetus can be determined by scanning the mother's abdomen with an ultrasound machine. This method is usually used at a clinic to check that a pregnancy is progressing well…

Complete. The nervous system

Look at the first chart and complete it with the parts of the nervous system.

Check. Changes in matter

List the differences between physical and chemical change. Give three examples of each.

Summaries - Waves. Light and sound

1. Waves An oscillatory or vibratory motion takes place around a central position. It produces the same amount of movement on both sides of this position. A wave is the transmission of an oscillatory or…

Look. Nationalities of Europe in the 19th century

Look at the map and answer the questions: Classify 19th century nationalities into their linguistic groupings. Make a four-column table using the information from the map. Why are the Russian, Austrian…