幻灯片 1
高二选修6
Unit 4
----
幻灯片 2Warming up
----
幻灯片 3 Fossil fuel (化石燃料): Ancient animal and plant material below the surface of the earth with a high carbon content, such as coal, oil and natural gas, which can be burnt to produce energy. Also known as non-renewable energy because once they are used they have gone forever; they cannot be renewed.
----
幻灯片 4 From the following pictures, you will know where all this energy comes from.
windmills
a coal power station
----
幻灯片 5an oil refinery
a nuclear power plant
----
幻灯片 6solar panels
hydro-electric dam
----
幻灯片 7Sample lists
light
heating
coal
non-renewable
oil
non-renewable
----
幻灯片 8
television
cassette player
video recorder
computer
natural gas
non-renewable
wind (wind power)
renewable
sun (solar energy)
renewable
uranium (nuclear energy)
non-renewable
----
幻灯片 9fridge
stove
washing machine
hairdryer
water (hydro-electric)
renewable
plant waste (biomass energy)
renewable
hot springs or geysers (geothermal energy)
renewable
the sea (tidal energy)
renewable
----
幻灯片 10Renewable or non-renewable?
√
----
幻灯片 11Renewable or non-renewable?
√
----
幻灯片 12----
幻灯片 13----
幻灯片 14----
幻灯片 15What is told in the picture?
----
幻灯片 16non-renewable energy source
----
幻灯片 17----
幻灯片 18 Notes to Renewable energy
Renewable energy resources may be used directly, or used to create other more convenient forms of energy. Examples of direct use are solar ovens, geothermal (地温) heating, and water and windmills.
----
幻灯片 19 Examples of indirect use which require energy harvesting are electricity generation through wind turbines (涡轮) or photovoltaic (光电的) cells, or production of fuels such as ethanol (酒精) from biomass (生物量).
----
幻灯片 20 Renewable energy (sources) or RES capture their energy from existing flows of energy, from on-going natural processes, such as sunshine, wind, flowing water, biological processes, and geothermal heat flows.
----
幻灯片 21 Most renewable energy, other than geothermal and tidal power, ultimately (基本上) come from the Sun. Some forms are stored solar energy such as rainfall and wind power which are considered short-term solar-energy storage,
----
幻灯片 22 whereas the energy in biomass (生物量) is accumulated (积聚) over a period of months, as in straw, or through many years as in wood.
----
幻灯片 23 Capturing renewable energy by plants, animals and humans does not permanently deplete (耗尽) the resource. Fossil fuels, while theoretically renewable on a very long time-scale, are exploited at rates that may deplete these resources in the near future.
----
幻灯片 24
1. Review the new words and
expressions you learned in this
class.
2. Preview Reading.
Homework
----
【点此下载】