WorksheetsUnit 8 & 9 Earthquakes and Volcanoes
Total questions: 16
Worksheet time: 32mins
Hot Spots form a chain of islands. What happens to the older islands that formed first?
The older islands remain active.
The older islands move away from the hot spot and are now considered active.
The older islands move away from the hot spot and are now considered dormant.
The older islands are neither active or dormant.
When does the formation of pyroclastic material occur?
It forms when temperature decreases and pressure increases.
It forms when temperature increases and pressure decreases
It forms when pressure stays the same and temperature decreases.
The epicenter of an earthquake is.....
can be located by studying seismic waves
directly above the focus
the area of the surface where most of the damage occurs
all of the above
Why does magma rise?
It is cooler than the surrounding the rock.
It is less dense than the surrounding rock
It is the same temperature as the surrounding rock
It is more dense than the surrounding rock
What is formed when continental crust collides with oceanic crust?
trench and subduction zone
ridge and rift valley
Volcanic arc and continental current
What area receives the most damage during an earthquake?
the focus
the epicener
the fault
subduction zone
Usually large earthquakes greater than 9.0 causes a large number of deaths. Why are there some large earthquakes and only a small amount of deaths?
high population in the area
the tsunami was not as large
the seismic waves were samll
low population in the area
Where do most earthquakes occur?
on the edges of volcanoes
on the boundaries of the plates
in mountainous regions
in areas where there are large rocks
What directly causes the earthquake?
the release of energy
heat from magma
sound waves traveling through rocks
pressure caused by convection
At what magnitude on the Richter Scale does an earthquake begin to show damage and can be felt.
greater than 3
greater than 5
6 and greater
over 7.9
Where are the greatest amount of active volcanoes found in the world?
Volcano Alley
Subduction Ring
Pacific Ring
Ring of Fire
Which type of wave travels fastest through the earth?
primary waves
secondary waves
surface waves
transverse waves
What is a depression after a volcanic eruption that collapses? The Yellowstone "supervolcano" actually is called a giant....
crater
caldera
vent
cinder cone
The Elastic Rebound Theory suggests that the fault will....
always return to its original position
always shift horizontally
always return to near its original position
none of these
The breaking and snapping of rocks causes.....
a volcano
an intrusion
an earthquake
a tilt
Which of these can happen during a volcanic eruption?
poisonous gases
pyroclastic flow
volcanic ash
all answers are correct
