1. By: mohamed ahmed alhammadi 5/2

2.  Solar energy comes from the light of the sun, which means it is  a renewable source of energy. We can use its light to create  pollution free electricity.

3.  When the sun shines on “solar cells,” they absorb its energy causing  a chemical reaction that generates electricity.  The electricity generated  by these solar cells – or  photovoltaic system – can  be used at homes and  factories or it can be  stored in a battery. This  stored energy then can be  used at night.

4.  The simplest photovoltaic systems power many of:  1) The small calculators and wristwatches  used everyday.  2) Provide electricity to pump water, power  communications equipment.  3) Provide electricity to our homes.  4) Domestic lighting.  5) Street lighting.  6) Water pumping.  7) Railway signals.

5.  1. non-polluting source of energy  2. It will last as long as the sun lasts.  3. It doesn’t have the dangers of nuclear technology  4. Solar electricity can be stored

6.  1. The equipment is too expensive for the common man and needs  a considerable area to install.  2. Weather plays a factor as the sun’s rays are not present if there  are clouds covering it or if it rains or snows. At night, this  energy is not available and one has to rely on other sources.  3. Another disadvantage is that its production efficiency  Electricity is a form of energy that people produce from the active  energy of wind, moving water and the stored energy in oil and coal.  At your home, electricity runs the lights, appliances like toasters,  television, toys and more.

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