ABOUT ONE TENTH OF EARTH'S SURFACE COVERED IN ICE.
This ice is built up over thousands of years , most ice occurs in thick sheets that cap the land at North and South poles.Ice also tops the peaks of high mountains , and rivers of ice called glaciers gouge deep valleys in polar and mountain region.
GLACIERS - A Glacier is a huge slow moving river of ice.As glacier moves downhill it can steep sided, u -shape U shaped valleys.
There are two main types of glaciers .Valley glacier and continental glacier.
Valley glacier are streams of flowing ice that are confined within steep-walled valleys .
Continental glacier - resemble huge chunks of ice and can cover a large part of a continent , like Antarctica.
GLACIAL FEATURES-
Melt water cave -It is formed by melted snow or ice.
Crevasse- Vertical crack in the ice a glacier moves
Iceberg- It is floated ice that has broken away.
Retreating glacier- Thinning of snow or ice on glacier.
Ice pinnacle- It is a very large piece of ice that juts out from a glacier.
ICE BERGS- Icebergs are form when huge chunk of ice from glaciers and icecaps break off and fall into the ocean.
Seven eighths of an iceberg's mass is below water .The one eighth we see is just the 'top of the iceberg'.
ICE berg flow because the density of ice is less than water.
Ice bergs comes in many shapes -
Tabular- It has steep sides with flat top like a huge table.
Block y- It has box shaped with steep sides
Dome -It has a rounded and smooth shape.
Wedge- It's top is narrow to a pyramid like point.
Pinnacle -It has one or more spires rise very high
Dry dock-It has u -shaped opening in the middle due to erosion.
SNOW TO ICE- Snow falls to the ground and compresses into small round ice particles called granular ice.As the ice compacts it contain less air and forms large granules known as firn . With the pressure of further snow , the firm welds into solid , glacial ice called ' blue ice'.
ICEBERG HAZARD- In 1912 , the luxury passenger liner ' Titanic ' struck an iceberg and sank.More than 1,500 people lost their lives in the disaster .
INTERESTING FACTS-
This ice is built up over thousands of years , most ice occurs in thick sheets that cap the land at North and South poles.Ice also tops the peaks of high mountains , and rivers of ice called glaciers gouge deep valleys in polar and mountain region.
GLACIERS - A Glacier is a huge slow moving river of ice.As glacier moves downhill it can steep sided, u -shape U shaped valleys.
There are two main types of glaciers .Valley glacier and continental glacier.
Valley glacier are streams of flowing ice that are confined within steep-walled valleys .
Continental glacier - resemble huge chunks of ice and can cover a large part of a continent , like Antarctica.
GLACIAL FEATURES-
Melt water cave -It is formed by melted snow or ice.
Crevasse- Vertical crack in the ice a glacier moves
Iceberg- It is floated ice that has broken away.
Retreating glacier- Thinning of snow or ice on glacier.
Ice pinnacle- It is a very large piece of ice that juts out from a glacier.
ICE BERGS- Icebergs are form when huge chunk of ice from glaciers and icecaps break off and fall into the ocean.
Seven eighths of an iceberg's mass is below water .The one eighth we see is just the 'top of the iceberg'.
ICE berg flow because the density of ice is less than water.
Ice bergs comes in many shapes -
Tabular- It has steep sides with flat top like a huge table.
Block y- It has box shaped with steep sides
Dome -It has a rounded and smooth shape.
Wedge- It's top is narrow to a pyramid like point.
Pinnacle -It has one or more spires rise very high
Dry dock-It has u -shaped opening in the middle due to erosion.
SNOW TO ICE- Snow falls to the ground and compresses into small round ice particles called granular ice.As the ice compacts it contain less air and forms large granules known as firn . With the pressure of further snow , the firm welds into solid , glacial ice called ' blue ice'.
ICEBERG HAZARD- In 1912 , the luxury passenger liner ' Titanic ' struck an iceberg and sank.More than 1,500 people lost their lives in the disaster .
INTERESTING FACTS-
- Despite its name , Greenland is mostly covered in a layer of ice.Averaging 1,790m(5,900ft) thick.A single glacier make up this ice.
- The largest piece of ice on earth is the Antarctic ice sheet.It's volume is 30 million cubic km(7.2 million cubic mile).
- The depth of ice cap covering the south pole is 4km (2.5 miles).
- When moving icebergs scrap past each other they produce a sound like barking dogs or screaming monkeys- and very louder.Some of these"ice quakes" are 'ear deafening.
- The coldest place in the world is Vladivostok, Antarctica.(-85Centegrade) .
Comments
Post a Comment