English Unlimited HTL 3, Schulbuch mit Audio-CD und CD-ROM

38 Success 03 LANGUAGE SKILLS EXPLORE LOOK AGAIN EXTRAS Complete the description with words from the box. There are two extra words you should not use. applications converting distribute electricity electrons fossil generators highly kinetic sources thermal 47 Electricity: what is it? Electricity is the ˜ow of electric charge. Electricity results from (1) moving from one atom to another. Nowadays we are able to control and (2) electricity to our homes, schools and businesses using it for all kinds of (3) such as heating and lighting a room, cooling food in fridges and running our computers.We also need electricity to power and control machines and robots that produce (4) sophisticated products. Electricity is known as a secondary energy source. ‰is means that we produce electricity by (5) other sources of energy such as (6) energy from burning coal, oil or natural gas, or (7) energy from moving molecules. Wind, sunlight and (8) fuels are called primary energy sources. We convert primary energy sources into electricity using electric (9) . Look at the pie chart below and answer the questions. 1 Which three energy sources had the highest share in worldwide electricity production? 2 Which three had the lowest? 3 Try to imagine what the diagram would look like today and draw it. Which energy sources do you think have become more important? Which less? 4 Which sources of energy do you think are the three most important and the three least important in Austria today? a 48 Worldwide electric power production in 2009 crude oil 5.1% coal 40.3% geothermal, solar, wind, biomass, waste 3.3% hydropower 16.5% nuclear power 13.4% natural gas 21.4% Source: iea.org Discuss your answers in groups. Mini research project. Where does our power come from? Is it imported from other countries or ‘homemade’? Research power production in Austria today and give a presentation about it in class. b 49 Info point: Electricity Nur zu Prüfzwecken – Eigentum des Verlags öbv