LSU GEOGRAPHY 2051, NAMIKAS, EXAM 1,2,3
AND 4 |ACTUAL 2026/2027 WITH QUESTIONS
AND ANSWERS VERIFIED/GRADED A+ INSTANT
PDF DOWNLOAD
Geog 2051 exam 4 (Namikas)
Scientists originally thought that glacial deposits in northern Europe
were the work of streams. What evidence indicated that the deposits
were not fluvial?
- The deposits included large boulders on flat landscapes.
- The sediments comprising the deposits were unsorted.
Large boulders transported long distances by a glacier are called
glacial erratics
Choose the sequence for the correct order of development of glacial
ice.
snow, granular snow, firn, glacial ice
Which substance consists of approximately 20% air?
glacial ice
Why is glacial ice a bright blue (cyan) color?
lack of trapped air
Which process causes a piece of ice to slide down the sloped hood of
a car?
basal sliding
How deep can crevasses go?
about 200 feet
Where are crevasses most likely to form?
,where the glacier flows over protrusions in the bedrock
What is the transition zone?
the transition between the brittle zone and the plastic deformation zone
The most recent glacial period was called the
Wisconsin glaciation.
Ice sheets and ice caps slowly flow
outward from their centers.
In a glacier, the fastest areas of flow are
farthest from the bedrock.
On a glacier, the transition between the zone of accumulation and the
zone of ablation is the
equilibrium line
Glaciers that reach sea level are called
tidewater glaciers
When a glacier has a positive mass balance,
the toe of the glacier advances downslope.
Which of the following best describes the accumulation zone?
the area where more snow falls than is lost through melting and sublimation
Which of the following best describes the ablation zone?
the area where sublimation and melting exceed snowfall
For a glacier to have a positive mass balance, what must occur?
It must experience more snowfall than sublimation and melting.
Which of the following is most likely to happen to a glacier with a
positive mass balance?
The toe is likely to advance.
,What is currently happening to the mass balances of glaciers around
the world?
They're becoming increasingly negative.
The area of bedrock that protrudes above a glacier is called a
nunatak
Different types of alpine glaciers
- cirque glacier
- valley glacier
- piedmont glacier
- ice cap
Glacial erosion is accomplished primarily through what processes?
- plucking
- abrasion
Identify the landscape features created by glacial erosion.
- paternoster lakes
- horn
- cirque
- hanging valley
- arete
- fjord
- U-shaped valley
- tarn
A ______ is a drowned glacial valley.
fjord
A pyramid‐shaped mountain peak formed by erosion by cirque
glaciers is a(n)
horn
Which feature is a mountain lake that forms within or just below a
cirque?
tarn
, Streams on outwash plains are typically
braided streams
Powdered rock created by glacial abrasion is called
glacial flour
What are glacier-carved, bowl-shaped depressions in mountains
called?
cirques
What is a tarn?
a lake formed from cirque erosion
What do plucking and abrasion do?
They carve into bedrock.
Different types of moraines
- lateral
- medial
- recessional
- terminal
Which feature is not a landform created by till deposited by an ice
sheet?
loess
What type of moraine forms only when two valley glaciers merge?
medial moraine
What type of moraine marks the farthest advance of the glacier's toe
through time?
terminal moraine
Why does chemical weathering occur more slowly in deserts?
insufficient moisture
Saline lakes form in
AND 4 |ACTUAL 2026/2027 WITH QUESTIONS
AND ANSWERS VERIFIED/GRADED A+ INSTANT
PDF DOWNLOAD
Geog 2051 exam 4 (Namikas)
Scientists originally thought that glacial deposits in northern Europe
were the work of streams. What evidence indicated that the deposits
were not fluvial?
- The deposits included large boulders on flat landscapes.
- The sediments comprising the deposits were unsorted.
Large boulders transported long distances by a glacier are called
glacial erratics
Choose the sequence for the correct order of development of glacial
ice.
snow, granular snow, firn, glacial ice
Which substance consists of approximately 20% air?
glacial ice
Why is glacial ice a bright blue (cyan) color?
lack of trapped air
Which process causes a piece of ice to slide down the sloped hood of
a car?
basal sliding
How deep can crevasses go?
about 200 feet
Where are crevasses most likely to form?
,where the glacier flows over protrusions in the bedrock
What is the transition zone?
the transition between the brittle zone and the plastic deformation zone
The most recent glacial period was called the
Wisconsin glaciation.
Ice sheets and ice caps slowly flow
outward from their centers.
In a glacier, the fastest areas of flow are
farthest from the bedrock.
On a glacier, the transition between the zone of accumulation and the
zone of ablation is the
equilibrium line
Glaciers that reach sea level are called
tidewater glaciers
When a glacier has a positive mass balance,
the toe of the glacier advances downslope.
Which of the following best describes the accumulation zone?
the area where more snow falls than is lost through melting and sublimation
Which of the following best describes the ablation zone?
the area where sublimation and melting exceed snowfall
For a glacier to have a positive mass balance, what must occur?
It must experience more snowfall than sublimation and melting.
Which of the following is most likely to happen to a glacier with a
positive mass balance?
The toe is likely to advance.
,What is currently happening to the mass balances of glaciers around
the world?
They're becoming increasingly negative.
The area of bedrock that protrudes above a glacier is called a
nunatak
Different types of alpine glaciers
- cirque glacier
- valley glacier
- piedmont glacier
- ice cap
Glacial erosion is accomplished primarily through what processes?
- plucking
- abrasion
Identify the landscape features created by glacial erosion.
- paternoster lakes
- horn
- cirque
- hanging valley
- arete
- fjord
- U-shaped valley
- tarn
A ______ is a drowned glacial valley.
fjord
A pyramid‐shaped mountain peak formed by erosion by cirque
glaciers is a(n)
horn
Which feature is a mountain lake that forms within or just below a
cirque?
tarn
, Streams on outwash plains are typically
braided streams
Powdered rock created by glacial abrasion is called
glacial flour
What are glacier-carved, bowl-shaped depressions in mountains
called?
cirques
What is a tarn?
a lake formed from cirque erosion
What do plucking and abrasion do?
They carve into bedrock.
Different types of moraines
- lateral
- medial
- recessional
- terminal
Which feature is not a landform created by till deposited by an ice
sheet?
loess
What type of moraine forms only when two valley glaciers merge?
medial moraine
What type of moraine marks the farthest advance of the glacier's toe
through time?
terminal moraine
Why does chemical weathering occur more slowly in deserts?
insufficient moisture
Saline lakes form in
