Monday 26 January 2009

blueberries avlenche:group members,thiren,jingxiang,minzhe,leshane,lijing

Avalanche
  • what is an avalanche?
  • It is ethier snow,sand,huge rocks or alot of water coming down from a tall mountain at a high speed.
  • what causes it?
  • Weather might be the biggest factor that can cause an avalanche. It plays a huge role in the development of snow on the ground. One must consider the weather days before the scheduled trip so as to know if it is safe to continue or not. Moreover, rapid change in weather can have bad effects on snow for snowpacks do not adapt easily to rapid changes.
  • The snowpack is not what you think it may seem on the surface. It may appear as a thin cover, but if you look at the cross-section of it, you may see several layers of snow that had developed through time. Snow builds up over the season, and during winter, a thicker layer is added to the previous one. Also, bonds between layers may be strong or weak. Avalanches occur if the bond is weak. Even if you have a strong bond in the upper layers of the snowpack, an avalanche may happen if the layers beneath it are weak.
  • Can singapore be affected?
  • No it can not be affected as there is no snow in singapore.Nor are there big rocks in singapore.

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