Glaciers

unsorted rock material deposited directly by ice as it melts

• glacial drift

• stratified drift

• till

• glacier

Tags

NGSS.MS-ESS2-2

Glaciers form when _____.

• less snow falls than melts 
• more snow falls than melts 
• less rain falls than freezes 
• more rain falls than freezes 

Tags

NGSS.MS-ESS2-4

When a glacier is experiencing more melting than snow accumulation it is said to be in a period of _____.

• glacial drift 
• glacial retreat 
• glacial advance 
• o  glacial outburst 

_____ is rock debris embedded in base of ice create polishing, grooves and striations.

• Plucking
• Abrasion
• Weathering
• Erosion

Tags

NGSS.MS-ESS2-2

_____ are parallel scratch marks on bedrock

• Plucking
• Abrasion
• Straitions
• Till

Tags

NGSS.MS-ESS2-2

The diagram represents a stream valley. Which diagram below best shows how this valley might be modified after a glacier has moved through it?

• 
• 
• 
• 

Tags

NGSS.MS-ESS2-2

On the map, what is represented by the dark line that cuts across most of North America?

• terminal moraine

• lateral moraine

• glacial striations

Tags

NGSS.MS-ESS2-2

Based on the shape of the terminal moraines, what direction did the glacier advance?

• North (towards the top of the picture)

• South (towards the bottom of the picture)

• East (towards the right of the picture)

• West (towards the left of the picture)

Tags

NGSS.MS-ESS2-2

The photograph shows scratched and grooved

bedrock with boulders on its surface. The scratches and grooves were most likely created when

• alternating thawing and freezing of water cracked the bedrock

• flooding from a nearby lake covered the bedrock

• a glacier dragged rocks over the bedrock

• rocks from a landslide slid along the bedrock

Tags

NGSS.MS-ESS2-2

Till deposited in the front of a glacier

• ground moraine
• lateral moraine
• terminal moraine
• medial moraine