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Tectonics and EarthQuakes

Total questions: 28

Worksheet time: 42mins

Name
Class
Date
1.
A ______ is a section of the lithosphere that slowly moves over the asthenosphere, carrying large slabs of continental and oceanic crust.
a)
wedge
b)
plate
c)
chunk
d)
fault
2.
A break in Earth's crust along which rocks move is called a ________.
a)
plate
b)
rift
c)
fault
d)
breach
3.
Scientists hypothesize that a super continent existed 200 million years ago.  This continent is called
a)
America
b)
Super Earth
c)
Pangea
d)
Eurasia
4.
A Plate Boundary where two plates move toward each other is called
a)
Convergent Boundary
b)
Divergent Boundary
c)
Transform Boundary
d)
Subduction
5.
Convergent Plate Movement can create
a)
Rifts
b)
Mountains
c)
Ocean Ridges
d)
Radiation
6.
_______________ Currents within the mantle cause the earth's plates to move and shift s molten material rises and falls due to density and gravity
a)
Convection
b)
Radiation
c)
Conduction
d)
Wind
7.
Divergent Plate movement can create
a)
Convection Currents
b)
Conduction
c)
Mountains
d)
Rifts and ocean ridges
8.
When pressure builds between two tectonic plates, it can suddenly release causing a (an) ______________________
a)
Earthquake
b)
Volcano
c)
Convection Current
d)
Gravitational Pull
9.

A divergent boundary occurs when plates ....

a)

Pull apart

b)

Come together

c)

Slide past each other

d)

subducting

10.

The Great Rift Valley in Africa and the Mid-Ocean Ridge were all created by this boundary

a)

Divergent

b)

Convergent

c)

Reform

d)

Transform

11.

The tectonic plates float on the

a)

lithosphere

b)

lower mantle

c)

outer core

d)

asthenosphere

12.

What occurs when two plates come together and the denser one is forced under back into the mantle?

a)

reduction

b)

conduction

c)

subduction

d)

convection

13.

The youngest rocks on the seafloor are most likely found...

a)

closest to a mid-ocean ridge

b)

farthest from a mid-ocean ridge

c)

near the coastlines

d)

closest to a deep sea trench

14.

Which seismic wave travels the fastest, always being the first detected by seismic stations?

a)

P waves

b)

S waves

c)

Surface waves

d)

Tsunami waves

15.

How does triangulation show the location of the epicenter of an earthquake?

a)

By scientist looking around to see where the most damage was created.

b)

By making triangles on a map.

c)

By calculating the difference between the P and S waves in arrival times and determining the distances from at least 3 seismic stations.

d)

By drawing 3 or more random sized circles on a map to see where they intersect.

16.
An instrument that detects and measures earthquakes is a 
a)
seismogram
b)
focus seismic map
c)
focus
d)
seismograph 
17.
Earthquakes under the water can cause _________________________________.
a)
tornadoes
b)
tsunamis
c)
lightening
d)
hailstorms
18.
Many earthquakes happen along the borders of...
a)
Countries
b)
Tetonic Plates
c)
Climate Zones
d)
None of the above.
19.

Earthquakes most often occur

a)

in the middle of plates

b)

near plate boundaries

c)

where thunderstorms are

d)

along the coast

20.

This model demonstrates a

a)

P wave shadow zone

b)

S wave shadow zone

c)

Surface wave shadow zone

d)

Convection currents

21.

This model represents a

a)

P wave shadow zone

b)

S wave shadow zone

c)

Surface wave shadow zone

d)

Convection currents

22.

It takes 12 minutes for an S Wave to arrive after a P wave. if the S wave arrived at 6:10, what time did the P Wave arrive?

a)

5:52

b)

5:58

c)

6:12

d)

6:22

23.
What is FALSE about the age pattern on the seafloor in the Atlantic Ocean? 
a)
The pattern is symmetrical on each side of the Mid-Atlantic ridge (plate tectonic boundary)
b)
The oldest seafloor can be found towards the edges of the ocean, near the eastern and western continents
c)
The youngest sea floor can be found towards the edges of the ocean, near the eastern and western continents
d)
Seafloor near the Mid-Atlantic ridge (plate tectonic boundary) can be up to 10 million years old
24.

What two words are BEST used to describe how the seafloor spreads?

a)

Magma and convection

b)

Earthquakes and convection

c)

Volcanoes and magma

d)

Volcanoes and earthquakes

25.
The zone where one plate slides under another is called the
a)
Convergent zone
b)
Subduction zone
c)
Transform zone
d)
Mantle zone
26.

The rocks on the ocean floor show evidence that the magnetism alternates North and South as you move along the sea-floor. This evidence of sea-floor spreading is reflected in the rocks on the ocean floor. The name for this evidence is called?

a)

Crustal subtraction

b)

Magnetic Reversals

c)

plate motion

d)

magnetic soldification

27.
Why does the ocean floor sink beneath the continent at Z?
a)
The ocean floor is less dense than the continent.
b)
The ocean floor is more dense than the continent.
c)
The ocean floor is moving faster than the continent.
d)
The ocean floor is moving slower than the continent.
28.

What is the approximate difference in travel times between the P and S Waves that arrived 7000 km from the Epicenter?

a)

9 min 20 sec

b)

19 min 0 sec

c)

8 min 40 sec

d)

10 min 0 sec

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