Avalanches

Quiz
•
Science
•
4th Grade
•
Hard
Standards-aligned
Lisa Thompson
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Loose Avalanche
has a low moisture, snow slab has a thinner, weaker failure layer beneath it
is also called "ground avalanche", happens because of rain, water percolation or water lubrication,
it forms near the surface, has a triangular pattern on descent, are triggered by a local loss of cohesion because of sun or rain
the flowing of snow is similar to the flowing of mud with high water content, typical of Northern Norway and Alaska
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which is NOT true?
moisture content is low, density is near 100 kg/m3 or less, snow temperatures are less than 0 °C and snow depth is more than 1 m
After the snow avalanche starts, a dust cloud which contains snow and air forms.
dry avalanches have a dense core of snow at the bottom of the moving mass
Powder avalanches often form by falling ice (or sometimes by ice avalanches) from steep icefalls, have less density than dry avalanches, their destructive power is more.
Tags
NGSS.MS-ESS3-2
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Avalanches are always caused by an external stress on the snow pack
True
False
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Wet Slab Snow Avalanche
has a low moisture, snow slab has a thinner, weaker failure layer beneath it
is also called "ground avalanche", happens because of rain, water percolation or water lubrication,
it forms near the surface, has a triangular pattern on descent, are triggered by a local loss of cohesion because of sun or rain
the flowing of snow is similar to the flowing of mud with high water content, typical of Northern Norway and Alaska
Tags
NGSS.MS-ESS3-2
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Slopes flatter than 28 degrees or steeper than 55 degrees typically have a lower incidence of avalanche occurrence
True
False
Tags
NGSS.MS-ESS3-2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
slopes with windward and sunny exposure have a lower incidence of avalanche hazard.
True
False
Tags
NGSS.MS-ESS3-2
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Avalanches may appear on the same place few times per year or once in a few centuries
True
Flase
Tags
NGSS.MS-ESS3-2
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