The focus of this website is to help Students in Sri Lanka with their A/L (advanced level ) national exam.You will be able to download past papers of 20 years and Syllabusb in Biology,Chemistry,Physics,Combines maths and General Information Technology. Be assured to find useful information and good contents and up to date news of syllabus changes and expected questions for 2012 and 2013.
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Sunday, August 5, 2012
Why are cloudy nights warmer than clear, star-lit nights?
the clouds reflects back the heat to the surface of the earth , so avarage heat lost from suface of the earth is minimum ,so we feel warmer.
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