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قديم 04-03-2010, 12:18 AM
الصورة الرمزية احمد كامل
احمد كامل احمد كامل غير متواجد حالياً
مراقب عام
 
تاريخ التسجيل: May 2009
الدولة: مصر
المشاركات: 1,411
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احمد كامل is a name known to allاحمد كامل is a name known to allاحمد كامل is a name known to allاحمد كامل is a name known to allاحمد كامل is a name known to allاحمد كامل is a name known to all
افتراضي



ADVANTAGES AND DISADVANTAGES OF SOLAR POWER

V. Ryan © 2005

1. Solar energy is free although there is a cost in the building of ‘collectors’ and other equipment required to c**vert solar energy into electricity or hot water.
2. Solar energy does not cause polluti**. However, solar collectors and other associated equipment / machines are manufactured in factories that in turn cause some polluti**.
3. Solar energy can be used in remote areas where it is too expensive to extend the electricity power grid.
4. Many everyday items such as calculators and other low power c**suming devices can be powered by solar energy effectively.
5. It is estimated that the worlds oil reserves will last for 30 to 40 years. ** the other hand, solar energy is infinite (forever).
1. Solar energy can **ly be harnessed when it is daytime and sunny.
2. Solar collectors, panels and cells are relatively expensive to manufacture although prices are falling rapidly.
3. Solar power stati**s can be built but they do not match the power output of similar sized c**venti**al power stati**s. They are also very expensive.
4. In countries such as the UK, the unreliable climate means that solar energy is also unreliable as a source of energy. Cloudy skies reduce its effectiveness.
5. Large areas of land are required to capture the suns energy. Collectors are usually arranged together especially when electricity is to be produced and used in the same locati**.
6. Solar power is used to charge batteries so that solar powered devices can be used at night. However, the batteries are large and heavy and need storage space. They also need replacing from time to time. QUESTI**S:
1. What is your opini** of solar energy ?
2. Do you think solar energy will answer the worlds energy crisis ?
3. Does solar power cause any polluti** or damage to the envir**ment ?
4. Research the internet to find informati** / pictures ** unusual solar powered devices. Present this informati** using software of your choice.
5. What devices in the future will be solar powered ? Explain your reas**ing.

6.
Draw a rich picture with SOLAR ENERGY at its centre. List associated words / themes around this main theme. Add pictures to illustrate and support many of the words / themes.




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