TERM 1
Define a glacier and give the conditions
required for the formation of glaciers
DEFINITION 1
mass of ice that persists through the year moving by gravity
formation: more snow accumulates in winter than is lost in
summer
TERM 2
Describe the changes that occur to snow in
order to change it into glacial ice. As part of
this you should define firn and glacial ice.
DEFINITION 2
snow loses air conetnt and compacts firn snow with 20-30%
air glacial ice is less than 20% air trapped in bubbles
TERM 3
Describe and explain the color of glacial ice
DEFINITION 3
air bubbles scatter red light giving ice a bright blue
TERM 4
Describe the processes by which glacial ice is
lost from glaciers
DEFINITION 4
glacial ice is lost in three ways 1) soblimination 2) melting 3)
calving - ice breaks and floats away
TERM 5
Define accumulation and ablation
DEFINITION 5
abolation= amount of ice lost by subliminatrion and melting
and calvins accumulation= ice added by snow
