An iceberg is a piece of glacier that broken off at the
edge, which touch the sea. These huge pieces of ice lie submerged under the
surface of the water. Icebergs vary greatly in size. Smaller one measuring from
5 to 10 meter across are called growler. But the most common one are those,
which measure over 100meters. There are some giant icebergs is only eight –
ninths as heavy as sea water, so that one-ninth of it sticks out above sea
level and the eight-ninth are below. Some of them can weigh as much as
180,000,000 tones. Due to the above two facts, they do not drift the winds.
rather , they follow the ocean current . When they reach the warmer latitudes,
the melt. Those that do not melt, pose danger to ships.
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