Metamorphic rocks

5.1. The origin of metamorphic rocks Metamorphic rocks are formed when existing rocks are subjected to high pressure and/or temperatures. This formation process is called metamorphism. Metamorphism…

True/false. The crisis of 1898

Are the following sentences about the crisis of 1898 true or false?: In 1895, there was a nationalist uprising on the island of Cuba. The Cuban nationalists had the support of Great Britain. The…

Complete. The outbreak of war

Complete these sentences with the missing words: On 28th June Franz Ferdinand, heir to the Empire, was assassinated. Austria accused of having organised the assassination and declared . Other European…

Check. The fall of Russia's Tsarist Empire

Remember what you have studied in this section and answer the questions: What were the main characteristics of Tsarist Russia? How was Russian society organised under Nicholas II? How do you think this…

The Cold War and peace (1845-1975)

The rivalry between the United States and the Soviet Union was referred to as the Cold War. While the tension between the two superpowers never led to war, both sides engaged in an arms race and…

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…

El paisaje

Posiciones relativas en el espacio. Actividad 12

Un punto P es exterior a dos rectas r y s que se cruzan. Sabiendo que una recta y un punto exterior a ella determinan un plano, ¿cómo puedes trazar por P una recta que corte las dos rectas r y s ?…

Fíjate. Figuras semejantes

No es suficiente que los lados de dos polígonos sean proporcionales para que estos sean semejantes. Un cuadrado y un rombo tienen siempre los lados proporcionales y en cambio no son semejantes. Tampoco…

Figuras semejantes. Actividad 3

Razona por qué dos polígonos regulares de igual número de lados son semejantes. Dos polígonos regulares de igual número de lados son semejantes si los correspondientes son y los correspondientes son .