section 4 glaciers. key terms glacier any large mass of ice that moves slowly over land there are...
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SECTION 4
GLACIERS
KEY
TERMS
GLACIER Any large mass of ice that
moves slowly over land There are 2 kinds of
glaciers continental and valley
C O N T I N E N TA L
A glacier that covers much of a continent or large island
VA L L E Y
A long narrow glacier that forms when snow and ice build up high in a mountain valley
ICE AGES When continental glaciers have covered large
parts of Earths surface
Plucking When rocks freeze at the bottom of glaciers
while they’re moving
TILL The mixture of sediments that a glacier deposits directly
on the surface
Ex. Clay silt sand and gravel
Moraine Till deposited at the edges of a glacier forming a ridge
Kettle A small depression that forms when a chuck of ice is left in a
glacial till
KEY CONCEPTSWhat are the two types of glaciers? Valley and continental
How does a valley glacier form and move? When snow and ice move
How do glaciers cause erosion and deposition? It brings up some of the snow and erodes it
THE E
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