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…

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…

Match. The crisis of the Bourbon monarchy and the War of Independence

Match the following sentences to the correct concept, event or figure: King of the Bourbon dynasty who abdicated in favour of his son under the influence of Napoleon. Treaty in which Ferdinand VII…

Final self-evaluation T07 07 - Art in the 19th century

Look at the illustration of Casa Batlló by Antoni Gaudí and do the following activity: Identify the correct parts of the building:

Check. The German Third Reich

Remember what you have studied in this section and answer the questions: What were the main characteristics of the Nazi regime in political terms? How did it achieve its aims? Why is the German state of…