B6U4 Warming up and reading.ppt

Global warming Unit 4 Is the whole world becoming warmer and warmer? Why? energy sources We depend on energy to do many things in our daily lives. For example, energy lights our cities and heats our buildings. Make a list of things that use energy in your home, in your school, or any other places you can think of. Warming up stove light things that use energy in your home micro-wave oven cassette player heating television hairdryer video player fridge computer washing machine stove Wind energy is used as power to produce electricity . Windmills where electricity is produced by burning coals. The coal power stations in which oil is refined(精炼) and made pure. The Oil Refineries a facility designed to convert(转变) nuclear energy into electricity. A nuclear power plant on the roof of a house on a bright sunny day are used to collect solar energy, making your house warm or heating your water. Solar panels are used to keep back water and raise its level for irrigation or for producing electricity, etc. The Hydro-electric (水力发电的) dams Guess it! Uranium Ore (铀矿石) The element uranium does not occur in pure form in nature but is found in minerals such as carnotite（钒钾铀矿）, pictured here. What source of energy? Geysers(间歇泉) Geothermal (地热的) Energy Plant An energy source is “renewable” when supplies of it never run out and “non-renewable” when one day they will run out. Which energy sources on your list are renewable and which are non-renewable? Discuss Things that use energy in your home Sources of energy Renewable/non-renewable light heating television cassette player video player computer fridge stove washing machine hairdryer coal oil natural gas wind (wind power) sun (solar energy) uranium (nuclear energy) water (hydro-electric power) plant waste (biomass energy) hot spring or geysers(间歇) (geothermal energy) the sea (tidal energy) non-renewable non-renewable non-renewable renewable renewable non-renewable renewable renewable renewable re