WorksheetsEarth's Layers and Seismic Activity Quiz
Total questions: 91
Worksheet time: 46mins
What is the thickness of the crust under the mountainous areas and in particular the Himalayas?
50-55 km
60-65 km
70-75 km
30-35 km
The discontinuity which marks the lower boundary of the crust is ______________
Crust-Mantle discontinuity
Oceanic discontinuity
SIAL layer
Mohorovicic discontinuity
The density of the oceanic layer in the crust is said to be ____________
3.00 g/cc
2.50 g/cc
1.90 g/cc
2.00 g/cc
The depth up to which the mantle is said to exist is ________
2000 km
1500 km
2900 km
1800 km
Which of the following is not true about Asthenosphere?
It is present in the upper mantle
It is in solid state
It is the source of volcanic activity
It is in plastic rather than solid state
Which of the following is true about the inner core?
It is believed to be a semi solid body
It is believed to be a solid body
It is believed to be a liquid body
It is believed to be a gaseous body.
The layer which does not transmit the S-waves is _______
Outer core
Crust
Mantle
Inner core
The density of the Earth at its centre is said to be ________
9.9 g/cc
8.8 g/cc
13 g/cc
12.7 g/cc
The layer which is said to support the slow-moving tectonic plates is ________
Asthenosphere
Lithosphere
Mohorovic sphere
Core layer
The layer which is believed to be the source of volcanic activity is ________
Inner core
Outer core
Asthenosphere
Mohorovicic layer
When seismic waves pass across the boundary between two different materials, ___________
the waves refract
the waves reflect
the waves change in velocity
all of the above
The S wave shadow zone is caused by the _________
the crust-mantle boundary
the outer core
the lower mantle
the inner core
Continental crust can be up to ______ kilometers thick.
5
25
70
150
Where do P waves travel the fastest?
upper mantle
lower mantle
outer core
inner core
In a deep mine, temperatures increase at the rate of ________
3 degrees C per km
25 degrees C per km
300 degrees C per km
1 degree C per km
Where is the Earth's magnetic field generated?
in the crust
in the mantle
in the outer core
in the inner core
The Moho separates:
the outer core from the inner core
the lithosphere from the asthenosphere
the asthenosphere from the Mesosphere
the crust from the mantle
The Gutenberg discontinuity separates:
the mantle from the core
the lithosphere from the asthenosphere
the asthenosphere from the Mesosphere
the crust from the mantle
Which one of the following term associations is FALSE?
asthenosphere --- plastic behavior
lithosphere --- rigid solid
outer core --- right solid
continental crust --- rigid solid
The lithosphere includes:
crust and uppermost, rigid mantle
outer core and inner core
asthenosphere and mesosphere
outer core and lower mantle
What region of the Earth takes up the greatest volume?
the crust
the outer core
the inner core
the mantle
The continental crust consists mainly of _________
granitic rocks
basaltic rocks
ultramafic rocks
gabbroic rocks
The oceanic crust consists mainly of _________
granitic rocks
basaltic rocks
ultramafic rocks
gabbroic rocks
Which of the following statements is false?
the crust-mantle boundary is called the Mohorovicic discontinuity
the oceanic crust consists of basalt and gabbro
the crust is less dense than the mantle
P-waves travel faster in the crust than in the mantle
The lithosphere is approximately _________ kilometres thick
25
100
250
2900
Which of the following statements is true
the lithosphere contains the crust
the crust contains the lithosphere
the lithosphere and crust are different terms for the same part of the Earth
the lithosphere and crust are totally separate parts of the Earth
What element makes up most of the Earth's core?
silicon
oxygen
iron
magnesium
The boundary between the inner core and the outer core lies at a depth of ______ kilometers
700
2900
5100
6400
Which of the following statements regarding the inner core is true?
P waves do not travel through the inner core
Primary S waves (those generated at the focus of an event) travel through the inner core
P waves travel through the inner core at a higher velocity than S waves travel through the inner core
the inner core is thought to be a liquid
In which layer of the Earth are convection currents believed to occur?
Outer core
Mesosphere
Asthenosphere
Lithosphere
Where is the thinnest part of a tectonic plate?
the middle of ocean
a mountain range
centre of continent
a coastal plain
This is the process in which hot material rises while cool material sinks?
slab pull
convection
ridge push
sea-floor spreading
What properties does the oceanic crust have compared to the continental crust?
thinner and more dense
thicker and more dense
thicker and less dense
thinner and less dense
Density of the core is highest because-
due to heavy pressure of overlying rocks
due to heavy temperature of overlying rocks
due to heavy density of overlying rocks
none of the above
The average density of the earth is-
2.3 gm/cm3
5.5 gm/cm3
17.2 gm/cm3
6.5 gm/cm3
Which waves cannot pass through liquid materials?
Primary waves
Secondary waves
Surface waves
All of the above
On the basis of velocity, seismic waves are divided into_______sets of waves-
six
five
four
three
Which of the following is an example of direct source to study interior of the earth?
Gravity
Seismic activity
Magnetic field
Volcanic eruption
The minimum thickness of crust under the oceans is
8 km
2 km
5 km
10 km
The outermost layer of the Earth is
asthenosphere
crust
trench
ridge
s a device used to:
sound an alarm
prevent earthquakes from occurring
record the vibrations produced during an earthquake
calm the seismologist during an earthquake
The earthquakes which occur along the boundaries of the tectonic plates are known as
Inter-Plate Earthquakes
Intra-Plate Earthquakes
Internal earthquakes
External earthquakes
Which theory is acclaimed as a satisfactory explanation about the cause of earthquakes?
Elastic Rebound theory
Clastic theory
Tremors theory
Seismology theory
The plate movements at boundaries are __________
Very rapid
Fast
Moderate in speed
Very slow
The magnitude of energy released by an earthquake is calculated using
Temblor scale
Richter scale
Tectonic scale
Seismic scale
Earthquakes usually occur at the boundary of
crustal plates
mantle plates
coral plate
volcanic beds
The greater the magnitude, the
lesser the amount of energy released
greater the amount of energy released
lesser the amount of energy absorbed
greater the amount of energy absorbed
The approximate range of earthquakes that occur each year is
hundreds
thousands
millions
billions
Richter scale is a
logarithmic scale
calculus scale
volumetric scale
area to vibration ratio scale
The Ring of Fire is located
around the Aztec Plate
around the Atlantic Plate
around the Convergent zone
around the Pacific Plate
Most earthquakes originate at depths of between
the surface and 100 kilometers
100 kilometers and 500 kilometers
500 kilometers and 700 kilometers
700 kilometers and the outer core
Which one of the following is incorrect?
Magnitude scale is known as the Richter scale.
Intensity scale is named after Mercalli,
Richter scale values span from 1-10.
Mercalli scale value spans from 1-15.
Earthquake with magnitude 4-4.9 may be classed as
strong
weak
light
great
Magma leaves a volcano through a
dyke.
sill.
vent
pipe
A volcano that is no longer erupting but is likely to erupt again in the future is
extinct.
dormant.
active
inactive
The volcanic region 'Ring of Fire' surrounds
Arabian Sea
Indian Ocean
Pacific Ocean
Atlantic Ocean
Volcanic activity leads to the formation of
Coastal terraces
River valleys
Crater lakes
Limestone caves
Vulcan was
Roman god of fire
Greek god of lightning
Greek god of the underworld
Roman god of thunder
Volcanoes are generally found where _______ pull apart or are coming together:
Intraplate
Tectonic plates
Earth's crust
None of these
Volcanoes are usually located on:
Divergent plate boundaries
Convergent plate boundaries
Hotspots
All of them
A place where two plates usually an oceanic plate and a continental plate collides is called:
Continental zone
Volcanic zone
Subduction zone
None of these
The volcanoes formed by the alternating layers of lava and rock fragments are called:
Cinder cones
Spatter cones
Composite volcanoes
Shields
Composite volcanoes are also known as:
Stratovolcanoes
Shields
Compound volcanoes
Cinder cones
Shield volcanoes are _____ in size:
Small
Medium
Long
Huge
Cinder cones' example is:
Mount Hood
Hekla in Iceland
Paricutin in Mexico
Mount St. Helens
Pyroclastic rocks form by:
a lava cooling on the surface of the Earth
violent, explosive volcanic eruption
a magma cooling slowing in the subsurface
two phases of cooling, one fast and one slow
The passageway which joins the vent to the crater of the volcano is known as
Vent
Cone
Pipe
Crater
What is the bowl-shaped basin in the top of the volcano called?
The vent
The crater
The magma chamber
The pipe
Which of the following volcano hazards is made up of rocky particles about the size of a grain of sand?
volcanic bombs
pahoehoe
volcanic cinders
volcanic ash
Before lava reaches the surface, the molten material is called
rock
magma
volcanic ash
liquid fire
If geologists detect many small earthquakes in the area near a volcano, what can they infer about the volcano?
It is dormant.
It is probably about to erupt.
It is extinct.
It is a good source of geothermal energy
An example of composite volcanoes is
Mount Everest
Puy de Dome
Mauna Loa
Mount Fuji
During eruption, the volcanic material is
blown to some meters
blown to many kilometers
blown to some inches
blown to some feet
Which rock is called a Primary rocks?
Igneous rock
Sedimentary rock
Metamorphic rock
None of the above
The formation of sedimentary rock involve
deposition
Erosion
Solidification
Hydration
All rock types are composed of
Minerals
Sediments
Organic
Fossils
Limestone is an example of which of the following rock
Metamorphic rock
Sedimentary rock
Igneous rock
None of the above
The cementation process is important in which type of rock formation?
Sedimentary
Igneous
Foliated
Metamorphic
The rock cycle involves the continuous transformation of rocks between the three main types: igneous, sedimentary, and:
Clastic
Crystalline
Metamorphic
Foliated
The Mohs scale is used to measure the:
Hardness of minerals
Density of minerals
Melting point of minerals
Cleavage of minerals
Which type of rock is formed from the cooling and solidification of molten magma beneath the Earth's surface?
Metamorphic rock
Extrusive igneous rock
Sedimentary rock
Intrusive igneous rock
Which of the following is a metamorphic rock?
Sandstone
Marble
Basalt
Granite
Which of the following is an example of an igneous rock?
Granite
Limestone
Marble
Slate
Sedimentary rocks are formed by ________.
Coolingof magma
Deposition of sediments
High temperature and pressure
Crystallization
Which type of rock can contain fossils?
Igneous
Sedimentary
Metamorphic
None of the above
What is a mineral's luster?
The way a mineral reflects light
The color of a mineral when viewed in thin section
The resistance of a mineral to scratching
The color of a mineral's powder
Which of the following is an example of a metallic mineral?
Clay
Dolomite
Copper
Marble
Which of the following is a non-metallic mineral?
Iron
Nickel
Clay
Copper
Which of the following is a characteristic of metamorphic rocks?
Formed from cooled magma
Formed from the deposition of sediments
Formed under high temperature and pressure
Contain fossils
Which of the following is NOT a way that sedimentary rocks are formed?
Deposition of weathered remains of other rocks
Accumulation and consolidation of sediments
Cooling and solidification of magma
Cementation of particles
Which of the following is a common characteristic of foliated metamorphic rocks?
Volcanic origin
High quartz content
Layering or banding
Random crystal orientation
