Sintetiza. Los flujos y los bloques comerciales

Recuerda lo que has trabajado en este apartado y contesta: ¿Qué son los flujos comerciales? ¿Los flujos son sólo de mercancías? ¿De qué más pueden ser? ¿Cuál es la materia prima fundamental en…

Identifica. El sector secundario

Clasifica estas industrias según la región donde se concentran: papel cerámica automóvil juguetes muebles metalurgia calzado y cuero química textil y derivados alimentación materiales de construcción

Los efectos de las migraciones

3.1. Efectos en la economía y en la sociedad Las consecuencias económicas Las migraciones internacionales tienen importantes efectos económicos, porque una buena parte de los ahorros que los…

El léxico español

The need for energy. Sources of energy

3.1. The need for energy through history In prehistoric times, human beings, who were nomadic hunter-gatherers, needed no other energy than fire to keep them warm and cook their food. Centuries later,…

Choose. The history of energy

Choose the correct answer: What was the first source of energy for humans? Which machine ushered in the industrial revolution? What is the most important source of energy for the Earth, and not just for…

Think about it. Energy consumption

Remember what you have studied in this section and answer the questions: What do people mean when they talk about sustainable energy consumption? Do you think we live more comfortably than previous…

Check. Test yourself

Remember what you have studied in this unit and answer the questions: List different forms of energy and give two examples of when each one operates. What type of energy is possessed by a girl who is…

True/False. Groups of waves on the electromagnetic spectrum

Answer true or false: All electromagnetic waves can be seen. Ultraviolet rays have more energy than visible light. Ultraviolet rays have more energy than gamma rays. The different colours of visible…

The American Revolution

5.1. The American War of Independence The United States of America has its origin in the thirteen colonies the British possessed on the east coast of North America. They were mostly inhabited by a…