There are also a number of other fascinating facts about natural Baltic Amber it floats in salt water but sinks in fresh water; its hardness measures 2.0-2.5 on the Mohs Hardness Scale; its density amounts to 0.96-1.096g/cm3. When amber is touched with fire, it produces an aroma of burning pine.
Location of Tanggu on a map. Tanggu is a city found in Tianjin, China. It is located 39.02 latitude and 117.65 longitude and it is situated at elevation 6 meters above sea level. Tanggu has a population of 535,298 making it the 2nd biggest city in Tianjin. It operates on the CDT time zone, which means that it follows the same time zone as Tianjin. Quick facts
1.Politically, the Tang and Song dynasties built a state structure based on the civil service exam that endured for a thousand years. 2.Tang and Song dynasty China experienced an economic revolution that made it the richest empire on earth. 3.Population grew rapidly, from 50 million60 million people during the Tang dynasty to 120 million by 1200, spurred in part by a the canal sytstems.