WorksheetsLANDSLIDES AND VOLCANIC ERUPTIONS
Total questions: 30
Worksheet time: 8mins
It is a human activity where rocks and soil are dig up or blasted off to get the minerals.
Removal of vegetation
Mining
Land pollution
Excavation of rocks
Which of the following would increase the risk of having a landslide?
Reinforcing the toe of the slope
Allowing water to infiltrate a slope
Reducing a slope angle by recontouring
Planting vegetation with deep roots in thick soil
Which of the following does not describe mass movement?
It describes how things move downward due to gravity.
It happens when the slope angle gets steeper than the angle of repose.
It has a greater chance of happening in wet conditions than in dry conditions
It will not happen after occurrence of heavy rain, because the water will increase the cohesive attraction of soil.
Why do so many landslides occur near mountains, rather than in flat areas?
Mountains have lots of rocks.
People like to build their houses near mountains.
The trees on the mountains tend to push down the dirt.
Mountains are steep which allow the dirt to slide down them quickly.
Mass wasting can be prevented by which measures?
Decreasing the slope gradient or decreasing the slope water content
Increasing the slope gradient or increasing the slope water content
Increasing the slope gradient while decreasing the slope water content
Decreasing the slope gradient while increasing the slope water content
Which of the following causes of landslides does deforestation belong?
morphological causes
geological causes
human causes
technology causes
Select the best explanation for the occurrence of landslides. They often occur when slopes are
Gentle and saturated
Steep and saturated
Lubricated
Bare of vegetation
Lava that is very thin and runny probably
has low silica content
is high in silica
A bowl shaped area that may form at the top of a volcano around the central vent
crater
vent
tube
leftovers
Which type of volcano is built by alternating layers of lava flows and ash flows?
Cinder Cone
Composite
Lava Dome
Shield
Which type of volcano has steep angled sides, throws blobs of lava in the air that fall as cinders, and is built over a short period of time?
Cinder Cone
Composite
Lava Dome
Shield
What triggers the small earthquakes that occur around a volcano before an eruption?
upward movement of magma
pyroclastic flow
cooling magma inside the crust
plate movements
What is the main hazard from a quiet volcanic eruption?
blasted projectile
earthquake
lava low
pyroclastic flow
What is the active volcano area around the Pacific Rim called?
Hot Spots
Pacific Ocean
Ring of Fire
Hawaii
A type of volcano that is erupting or will erupt in the near future is a(n) ________ volcano.
extinct
active
dormant
explosive
