Earthquakes

3.1. What is an earthquake? An earthquake is when the ground vibrates or shakes. It can last from a few seconds to a few minutes. The focus of an earthquake, also called the hypocentre, is the point…

Final Autoevaluation T10 09 - Obtaining and using energy

Use the diagram to answer the following questions: In which area is it necessary to save? Choose from among this list of measures for sustainable consumption. Choose the most efficient energy saving…

Match. The Soviet model in crisis

Match the beginning of each sentence with the correct ending: For decades, the USSR was the world's second superpower and had great influence over many countries,... At the beginning of the 1980s,…

Final self-evaluation T12 08 - Spain under Franco (1939-1975)

Complete the sentences with the missing words: The country's came to an end in 1953, when Spain signed a collaboration agreement with the United States and a Concordat with the Holy See. Under…

Check. The transition to democracy

Remember what you have studied in this section and answer the questions: Describe the role played by the political parties and these people in dismantling Francoism: Juan Carlos I, Carlos Arias Navarro…

Tendencias musicales en el siglo XX

Ética y civismo

Actividades lúdicas. El circo

Culture

Culture Puzzling games

Número de soluciones

Un resultado muy importante del álgebra es este: El número de soluciones de una ecuación que no sea identidad no puede ser superior a su grado. Así, una ecuación de grado 1 tendrá, a lo sumo, una…