Incandescent bulbs

 When an electric current passes through the metalic filament of a light bulb, it produces light: It is callled incandescense

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Energy resources

Energy sources are natural resources that we can use for generate different forms of energy and we can transform that energy for various purposes. We can classify into two general categories : NON-RENEWABLE ENERGY SOURCES. They come from natural resources that are limite and can be exhausted, and it would take million years to regenerate. They are the most commonly used energy sources. They include fossil fuels and nuclear energy, which u ses radioactive materials, such as uraniumials, such as uranium
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Wikis

A  wiki  is a collection of web pages that visitors can edit, modify or expand. In this way, the content grows quickly with the contributions of the people working on it. Adding new content to a wiki page is quite easy. Look for an Edit button and click on it. Make changes to the existing content or write a new contribution.  Look for a Save button and click on it to save the changes.  Wikipedia, which was created in January 2001, is a universal encyclopaedia with no restrictions on use, modification or redistribution. Anyone can contribute their knowledge to the project.
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