Week 11: Human Impact on Watersheds & Glaciers

This force causes the movement of glaciers

• pressure
• ice age
• gravity
• firn

Glaciers form when _____.

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

Glaciers only form near Earth’s poles.

• True
• False

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 

How do glaciers erode land?

• By picking up soil and rocks and depositing them in new location
• By picking up water from lakes and streams and carrying it to the ocean
• By causing rain and snow in an area
• By lowering the atmospheric pressure, causing intense windstorms

How were the Great Lakes formed?

• Canadians built a series of dams, making huge reservoirs

• Glaciers carving the land during the Ice Age, then melting and leaving behind moraines

• Water flowing in from the Atlantic Ocean

• Underground springs filled up the lake and continue to do so

A gigantic mass of moving ice

• glacial drift

• stratified drift

• till

• glacier

What type of glacier forms in a mountainous area?

• Alpine

• continental

• till

• moraine

unsorted rock material deposited directly by ice as it melts

• glacial drift

• stratified drift

• till

• glacier

What type of glacier covers huge areas of land?

• alpine

• continental

• till

• moraine