
Unit 9 - Page 283 - 292
Authored by J Martin
Geography
11th Grade
Used 1+ times

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25 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Gabions are commonly used to:
Prevent floods
Stabilize slopes and reduce erosion
Redirect rivers
Build roads in steep areas
Answer explanation
Explanation: Gabions (wire cages filled with rocks) hold soil in place and prevent it from sliding downhill.
Example: In hilly areas, gabions are placed along roadsides to stop landslides and protect vehicles.
Explanation: Gabions (wire cages filled with rocks) hold soil in place and prevent it from sliding downhill.
Example: In hilly areas, gabions are placed along roadsides to stop landslides and protect vehicles.
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Gabions are:
Large concrete blocks
Rock-filled wire cages
Steel beams used in construction
Plastic nets for soil retention
Answer explanation
Explanation: Gabions are like strong metal baskets filled with rocks, used to stabilize slopes and absorb pressure from soil movement.
Example: Gabions are placed near rivers to prevent erosion during floods.
Explanation: Gabions are like strong metal baskets filled with rocks, used to stabilize slopes and absorb pressure from soil movement.
Example: Gabions are placed near rivers to prevent erosion during floods.
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
A major trigger for landslides in the Caribbean is:
Earthquakes
Prolonged droughts
Tropical storms with heavy rainfall
Excessive farming activities
Answer explanation
Explanation: Rainfall soaks the soil, making it heavy and unstable, causing landslides.
Example: After hurricanes in the Caribbean, landslides often destroy roads and homes on hillsides.
Explanation: Rainfall soaks the soil, making it heavy and unstable, causing landslides.
Example: After hurricanes in the Caribbean, landslides often destroy roads and homes on hillsides.
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
What is the primary difference between dry and wet avalanches?
Dry avalanches involve more snow, while wet avalanches involve mud.
Wet avalanches are slower but denser than dry avalanches.
Dry avalanches are triggered by rainfall, while wet avalanches are triggered by wind.
Wet avalanches occur only in coastal regions.
Answer explanation
Explanation: Wet avalanches have melted snow, so they move slowly but carry more weight. Dry avalanches are fast because they’re made of loose snow.
Example: A wet avalanche can crush trees and buildings, while a dry avalanche sweeps everything away quickly, like powder.
Explanation: Wet avalanches have melted snow, so they move slowly but carry more weight. Dry avalanches are fast because they’re made of loose snow.
Example: A wet avalanche can crush trees and buildings, while a dry avalanche sweeps everything away quickly, like powder.
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Gabions are especially effective in reducing:
Wave erosion in coastal areas
Water pressure on dams
Slope instability in mountainous regions
Earthquake risks
Answer explanation
Explanation: Gabions are placed on unstable slopes to prevent soil from sliding.
Example: Engineers use gabions to protect mountain roads from collapsing during rains.
Explanation: Gabions are placed on unstable slopes to prevent soil from sliding.
Example: Engineers use gabions to protect mountain roads from collapsing during rains.
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The impact of dry avalanches is primarily due to:
Their high speed and air pressure
Their dense, slow-moving flow
Water saturation in snow
The lack of vegetation in the area
Answer explanation
Explanation: Dry avalanches move so fast that the air they push ahead of them creates immense force, causing destruction.
Example: A skier triggering a dry avalanche could be buried under tons of fast-moving snow in seconds.
Explanation: Dry avalanches move so fast that the air they push ahead of them creates immense force, causing destruction.
Example: A skier triggering a dry avalanche could be buried under tons of fast-moving snow in seconds.
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Wet avalanches are typically associated with:
High temperatures melting snow
Earthquakes in snowy regions
Wind-driven snow in high-altitude areas
Heavy rains triggering snowmelt
Answer explanation
Explanation: When temperatures rise, the snow melts and becomes heavy, causing it to slide downhill.
Example: Springtime avalanches in the Alps often occur because warmer weather melts the snowpack.
Explanation: When temperatures rise, the snow melts and becomes heavy, causing it to slide downhill.
Example: Springtime avalanches in the Alps often occur because warmer weather melts the snowpack.
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