Chinese surnames are used by Han Chinese and Sinicized ethnic groups in Mainland China, Hong Kong, Macau, Malaysia, Taiwan, Korea, Singapore, Vietnam and among overseas Chinese communities. In ancient times two types of surnames existed, namely xing (Chinese: å§; pinyin: xÃ¬ng) or lineage names, and shi (Chinese: æ°; pinyin: shÃ¬) or clan names.
An ice sheet is a large permanent layer of ice covering a continental shelf, defined as having an extent greater than 50,000 km2 (19,305 mi2). An ice sheet is larger than a glacier or ice shelf.
There are different kinds of glacier and they change over time. Eighty five per cent of the world's ice is found in the giant Antarctic ice sheet. This ice sheet would cause the earth's oceans to rise by seven metres if it melted. Ice caps cover less area than ice sheets. The Himalayan ice cap is home to Mount Everest, the world's highest mountain.