Virginia Earth Science Glaciers

Glaciers are found at high ​ (a)   , because these are the locations where more snow falls during the winter.

The snow accumulates and ​ (b)   changes it to glacial ​ (c)   .

The ice flows slowly out of these centers of snow fields because of the force of​ (d)   .

• altitudes and latitudes
• compaction and recrystallization
• ice
• gravity

Tags

NGSS.MS-ESS2-2

Thee fastest ice flow occurs in the_________ of the glacier where there is less friction with the valley walls.

• Valley walls

• Center

• Outside

Glaciers found in high mountains are called ​ (a)   glaciers.

These glaciers tend to make a rough, jagged landscape gouging out bowl shaped ​ (b)   and u-shaped valleys and leaving ​ (c)   (sharp ridges) and ​ (d)   (pyramid shaped mountains) as they move out of the snow field.

• Alpine
• cirgues
• aretes
• horns

Match the following

• Cirques

• 
• Alpine glacier

• 
• Aretes

• 
• Horn

• 
• Continental glacier

• 

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

NGSS.MS-ESS2-4

As glaciers move they carry, push, and drag huge amounts of ​ (a)  

( unsorted sediment). Sediment frozen in the bottom of the glacial ice

( ​ (b)   ) abrades the surface over which the glacier passes.

Large fragments form parallel ​ (c)   in the surface indicating the ​ (d)   the glacier was moving.

• glacial till
• the cutting tools
• striations or grooves
• direction

Tags

NGSS.MS-ESS2-2

The melting ice left large boulders, called ​ (a)   scattered over the landscape.

The ​ (b)   of an erratic may be so distinct as to enable scientists to trace the rock to its ​ (c)   , giving evidence of the ​ (d)   of the ice flow.

• erratics
• rock type
• point of origin
• direction

Tags

NGSS.MS-ESS2-2

Match the following

• Parallel striations

• 
• Glacial till

• 
• Erratics

• 
• Cutting tools

• 

Tags

NGSS.MS-ESS2-2

Depositional features are made of unsorted glacial material called ​ (a)   which is sorted and deposited by glacial streams.

Features made of till are called ​ (b)   . Often the surface is covered with ​ (c)   which has been deposited under the glacier.

A ridge marking the farthest advance of the ice material is called the ​ (d)   .

• till or outwash
• moraines
• ground moraine
• terminal moraine

Match the following

• Glacial till

• 
• Moraine

• 
• Terminal moraine

• 

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

Winding ridges of glacial material deposited in streams within or below the ice are ​ (a)   .

​ (b)   are cone shaped hills formed along the ice front.

​ (c)   are elongated hills shaped like the back of a spoon.

• eskers
• Kames
• Drumlins