GLACIERS Any large mass of ice that moves slowly over land

GLACIERS There are two types of glaciers Continental Glacier A glacier that covers much of a continent or large island Antarctica Glacier

GLACIERS There are two types of glaciers Continental Glacier It spreads out in all directions Antarctica Glacier

GLACIERS There are two types of glaciers Continental Glacier The glacier covering Antarctica is over 3 kilometers thick How many miles thick is the Antarctica glacier? Antarctica Glacier

GLACIERS There are two types of glaciers Continental Glacier 3 kilometers is how many miles? 1 kilometers =.62 miles 3 kilometers = 3 X.62 miles Antarctica Glacier 3 kilometers = 1.86 miles

GLACIERS There are two types of glaciers Continental Glacier The glacier covering Antarctica is over 3 kilometers thick 3 Kilometers = 1.86 miles Antarctica Glacier

GLACIERS There are two types of glaciers Continental Glacier During the last ice age a continental glacier covered most of North America

GLACIERS There are two types of glaciers A long narrow glacier that forms when snow and ice build up high in a mountain valley Valley Glacier

GLACIERS There are two types of glaciers The sides of the mountains keep these glaciers from spreading out in all directions Valley Glacier

GLACIERS There are two types of glaciers They usually move down valleys that have already been cut by rivers Valley Glacier

GLACIERS There are two types of glaciers Glaciers form where more snow falls that melts Valley Glacier

GLACIERS There are two types of glaciers Once the depth of snow and ice reaches more than 30 to 40 meters, gravity begins to pull the glacier downhill Valley Glacier

GLACIERS The two processes by which glaciers erode the land are plucking and abrasion Plucking Abrasion

GLACIERS The two processes by which glaciers erode the land are plucking and abrasion Plucking The weight of the ice can break the rocks apart. These rock fragments freeze to the bottom of the glacier.

GLACIERS The two processes by which glaciers erode the land are plucking and abrasion Abrasion When the glacier moves, it drags the rocks across the land This process is called abrasion

GLACIERS Before valley glaciers form the valley is V shaped Valley Glacier

GLACIERS After valley glaciers have formed and melted the valley is U shaped Valley Glacier

GLACIERS Valley Glacier If you see a U shaped valley you can probably conclude that it was at one time a V shaped valley that was shaped into a U shaped by a glacier

GLACIERS Valley glaciers V Shaped Valley U Shaped Valley U-shaped Valley