Sea level the warmer water expands. For at least the last 100 years, sea level has been rising at an average rate of about per year. Most of this rise can be attributed to the increase in temperature of the sea and the resulting slight thermal expansion of the upper of sea water. Additional contributions, as much as one-quarter of the total, come from water sources on land, such as melting snow and glaciers and extraction of groundwater for irrigation and other agricultural and human uses. Pilots can estimate height above sea level with an altimeter set to a defined barometric pressure.
Singapore-Cambridge GCE Normal Level Singapore-Cambridge GCE Normal Level The Singapore-Cambridge General Certificate of Education Normal Level (N-Level) examination is a national examination held annually in Singapore. It is taken after four years in the normal academic or normal technical stream (secondary education). For subjects examined in English and foreign languages, the examining authority are the University of Cambridge Local Examinations Syndicate. For localized language subjects, the examining authority is the Ministry of Education, Singapore. The Singapore-Cambridge General Certificate of Education Normal Level examination is sub-categorized into Normal (Academic) Level (N(A) Level) and Normal (Technical) Level (N(T) Level), catering to candidates under the Normal (Academic)