Question 1

Describe a sequence of events that would lead to sinkhole collapse.

Accepted Answer

Dissolution of limestone (or gypsum,or r

Question 2

Subsidence in areas underlain by organic (swampy)soils is due in part to

Accepted Answer

A)  a high water table. 
B)  bacterial decomposition of organic material to CO₂. 
C)  infusion of CO₂. 
D)  irrigation. 
E)  river flooding. 
A)  a high water table. 
B)  bacterial decomposition of organic material to CO₂. 
C)  infusion of CO₂. 
D)  irrigation. 
E)  river flooding.

Question 3

Construction of the Aswan dam hundreds of kilometres from the Nile delta has still led to subsidence in the delta.

Accepted Answer

A) True 
 B)False

Question 4

Volcanism can cause both uplift and subsidence: uplift in areas of deposition of new volcanic rocks,and subsidence over the empty magma chamber.

Accepted Answer

A) True 
 B)False

Question 5

Why are rock salt and gypsum deposits commonly associated with subsidence?

Accepted Answer

These types of rock

Question 6

"Karst plain" describes a ground surface that is pockmarked with many sinkholes.

Accepted Answer

A) True 
 B)False

Question 7

Destructive subsidence and development of karst can result in favourable formations,which supply clean drinking water.

Accepted Answer

A) True 
 B)False

Question 8

The city of Venice,Italy has been subsiding (sinking)at a rate of

Accepted Answer

A)  10 cm/year. 
B)  2 mm/year. 
C)  100cm/year. 
D)  15 mm/year. 
E)  25 cm/year. 
A)  10 cm/year. 
B)  2 mm/year. 
C)  100cm/year. 
D)  15 mm/year. 
E)  25 cm/year.

Question 9

Expansive soils

Accepted Answer

A)  cause problems in areas of permafrost. 
B)  are a problem only in areas with pronounced wet and dry seasons. 
C)  are not affected by vegetation. 
D)  produce different ill-effects to ice-prone soils. 
E)  are found in areas of karst. 
A)  cause problems in areas of permafrost. 
B)  are a problem only in areas with pronounced wet and dry seasons. 
C)  are not affected by vegetation. 
D)  produce different ill-effects to ice-prone soils. 
E)  are found in areas of karst.

Question 10

What is the difference between solution and collapse sinkholes?

Accepted Answer

Solution sinkholes occur at the surface

Question 11

Tower karst forms in

Accepted Answer

A)  temperate rainy regions. 
B)  humid tropical regions. 
C)  dry warm regions. 
D)  mountainous rainy regions. 
E)  permafrost regions. 
A)  temperate rainy regions. 
B)  humid tropical regions. 
C)  dry warm regions. 
D)  mountainous rainy regions. 
E)  permafrost regions.

Question 12

What are three natural service functions that subsidence can provide?

Accepted Answer

1.can lend to karst formation resulting

Question 13

How does the building of dykes and levees along the Mississippi,intended to prevent flooding by the Mississippi,actually increase the severity of the flooding that now occurs?

Accepted Answer

The dykes and levees prevent the Mississ

Question 14

When groundwater is pumped for irrigation,the water percolates through the surface and back into the water table,effectively refilling the reservoir,therefore no net subsidence occurs.

Accepted Answer

A) True 
 B)False

Question 15

Half of the Canadian Arctic is underlain by permafrost.

Accepted Answer

A) True 
 B)False

Question 16

In the next great earthquake along the Cascadia subduction zone,the west coast of Vancouver Island is expected to subside suddenly.

Accepted Answer

A) True 
 B)False

Question 17

How can scientists reconstruct past climate changes from caves?

Accepted Answer

A)  by measuring the rates of cavern enlargement using carbon isotopes 
B)  by measuring isotopes of oxygen in cave formations such as stalactites 
C)  by measuring the amount of carbon dioxide in air exiting at cave openings 
D)  by examining and dating animal remains in cave deposits 
E)  by quantifying size and production rate of sinkholes above a cave system 
A)  by measuring the rates of cavern enlargement using carbon isotopes 
B)  by measuring isotopes of oxygen in cave formations such as stalactites 
C)  by measuring the amount of carbon dioxide in air exiting at cave openings 
D)  by examining and dating animal remains in cave deposits 
E)  by quantifying size and production rate of sinkholes above a cave system

Question 18

Thin-bedded limestone rocks are more vulnerable to dissolution than thick-bedded limestone rocks.

Accepted Answer

A) True 
 B)False

Question 19

Karst formations are important sources of clean drinking water.

Accepted Answer

A) True 
 B)False

Question 20

Limestone dissolution in a karst setting is due largely to the generation of this acid.

Accepted Answer

A)  nitric acid 
B)  humic acid 
C)  carbonic acid 
D)  perchloric acid 
E)  bicarbonate acid 
A)  nitric acid 
B)  humic acid 
C)  carbonic acid 
D)  perchloric acid 
E)  bicarbonate acid

Describe a sequence of events that would lead to sinkhole collapse.

Subsidence in areas underlain by organic (swampy)soils is due in part to

Construction of the Aswan dam hundreds of kilometres from the Nile delta has still led to subsidence in the delta.

Volcanism can cause both uplift and subsidence: uplift in areas of deposition of new volcanic rocks,and subsidence over the empty magma chamber.

Why are rock salt and gypsum deposits commonly associated with subsidence?

"Karst plain" describes a ground surface that is pockmarked with many sinkholes.

Destructive subsidence and development of karst can result in favourable formations,which supply clean drinking water.

The city of Venice,Italy has been subsiding (sinking)at a rate of

Expansive soils

What is the difference between solution and collapse sinkholes?

Tower karst forms in

What are three natural service functions that subsidence can provide?

How does the building of dykes and levees along the Mississippi,intended to prevent flooding by the Mississippi,actually increase the severity of the flooding that now occurs?

When groundwater is pumped for irrigation,the water percolates through the surface and back into the water table,effectively refilling the reservoir,therefore no net subsidence occurs.

Half of the Canadian Arctic is underlain by permafrost.

In the next great earthquake along the Cascadia subduction zone,the west coast of Vancouver Island is expected to subside suddenly.

How can scientists reconstruct past climate changes from caves?

Thin-bedded limestone rocks are more vulnerable to dissolution than thick-bedded limestone rocks.

Karst formations are important sources of clean drinking water.

Limestone dissolution in a karst setting is due largely to the generation of this acid.

Introduction to Natural Hazards

Internal Structure of Earth and Plate Tectonics

Earthquakes

Tsunamis

Volcanoes and Volcanic Eruptions

Landslides

Snow Avalanches

River Flooding

Atmosphere and Severe Weather

Hurricanes and Extratropical Cyclones

Waves, Currents, and Coastlines

Wildfires

Climate Change

Meteorite Impacts and Extinctions

Filters

Exam 8: Subsidence and Soil Expansion and Contraction

Describe a sequence of events that would lead to sinkhole collapse.

Subsidence in areas underlain by organic (swampy)soils is due in part to

Construction of the Aswan dam hundreds of kilometres from the Nile delta has still led to subsidence in the delta.

Volcanism can cause both uplift and subsidence: uplift in areas of deposition of new volcanic rocks,and subsidence over the empty magma chamber.

Why are rock salt and gypsum deposits commonly associated with subsidence?

"Karst plain" describes a ground surface that is pockmarked with many sinkholes.

Destructive subsidence and development of karst can result in favourable formations,which supply clean drinking water.

The city of Venice,Italy has been subsiding (sinking)at a rate of

Expansive soils

What is the difference between solution and collapse sinkholes?

Tower karst forms in

What are three natural service functions that subsidence can provide?

How does the building of dykes and levees along the Mississippi,intended to prevent flooding by the Mississippi,actually increase the severity of the flooding that now occurs?

When groundwater is pumped for irrigation,the water percolates through the surface and back into the water table,effectively refilling the reservoir,therefore no net subsidence occurs.

Half of the Canadian Arctic is underlain by permafrost.

In the next great earthquake along the Cascadia subduction zone,the west coast of Vancouver Island is expected to subside suddenly.

How can scientists reconstruct past climate changes from caves?

Thin-bedded limestone rocks are more vulnerable to dissolution than thick-bedded limestone rocks.

Karst formations are important sources of clean drinking water.

Limestone dissolution in a karst setting is due largely to the generation of this acid.

Introduction to Natural Hazards

Internal Structure of Earth and Plate Tectonics

Earthquakes

Tsunamis

Volcanoes and Volcanic Eruptions

Landslides

Snow Avalanches

River Flooding

Atmosphere and Severe Weather

Hurricanes and Extratropical Cyclones

Waves, Currents, and Coastlines

Wildfires

Climate Change

Meteorite Impacts and Extinctions

Filters