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Multiple
Choice
Completion
Completion
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Some early mapmakers thought
that the coastline of South
America matched the coastline
of Asia.
A 100
False; Africa
A 100
DAILY
Place A Wager
DOUBLE
A 200
Convection currents in the
mantle produce a force that
causes motion called slab
pull.
A 200
False; basal drag
A 200
As new seafloor moves away
from an ocean ridge, the seafloor
cools and becomes more dense
than the material beneath it.
A 300
True
A 300
If two continental plates
converge, a subduction
zone forms.
A 400
False; mountain
A 400
The weight of a subducting plate
helps to pull the lithosphere into
a subduction zone in a process
called slab pull.
A 500
True
A 500
The circulation of material
caused by differences in
density is called convection.
B 100
True
B 100
Scientists at the time rejected
Wegener’s hypothesis of
continental drift because he
could not explain how or why
Earth’s continents move.
B 200
True
B 200
According the theory of plate
tectonics, plates interact at plate
boundaries by deflecting each
other, moving away from each
other, or moving horizontally
past each other.
B 300
False; coming toward
B 300
Ridge push moves lithosphere in
opposite directions away from the
mid-ocean ridge.
B 400
True
B 400
Normal polarity is a state in
which magnetized objects orient
themselves to point south.
B 500
False; Reversed
B 500
The youngest rocks on the ocean floor are
located ____.
a. near continents
b. at mid-ocean ridges
c. far from mid-ocean ridges
d. near Asia
C 100
The youngest rocks on the ocean floor are
located ____.
a. near continents
b. at mid-ocean ridges
c. far from mid-ocean ridges
d. near Asia
C 100
The crust and upper mantle make up
Earth's ____.
a. lithosphere
b. asthenosphere
c. core
d. continents
C 200
The crust and upper mantle make up
Earth's ____.
a. lithosphere
C 200
Plates of the lithosphere float on the
____.
a. crust
b. asthenosphere
c. core
d. atmosphere
C 300
Plates of the lithosphere float on the
____.
a. crust
b. asthenosphere
c. core
d. atmosphere
C 300
While studying the ocean floor,
scientists found ____ bands of
magnetism.
a. plastic
b. alternating
c. no
d. rectangular
C 400
While studying the ocean floor,
scientists found ____ bands of
magnetism.
a. plastic
b. alternating
c. no
d. rectangular
C 400
The hypothesis that continents have
slowly moved to their current
locations is called ____.
a. continental drift
b. continental slope
c. magnetic reversal
d. convection
C 500
The hypothesis that continents have
slowly moved to their current
locations is called ____.
a. continental drift
C 500
The result of plate movement can
be seen at ____.
a. abyssal plains
b. ocean margins
c. plate centers
d. plate boundaries
D 100
The result of plate movement can
be seen at ____.
a. abyssal plains
b. ocean margins
c. plate centers
d. plate boundaries
D 100
A lack of explanation for continental drift
prevented many scientists from accepting
that a single supercontinent called ____
once existed.
a. Glomar
b. Glossopteris
c. Pangaea
d. Wegener
D 200
A lack of explanation for continental drift
prevented many scientists from accepting
that a single supercontinent called ____
once existed.
a. Glomar
b. Glossopteris
c. Pangaea
d. Wegener
D 200
DAILY
Place A Wager
DOUBLE
D 300
Scientists have observed that the
continents move apart or come together
at speeds of a few centimeters per
____.
a. century
b. decade
c. day
d. year
D 300
Scientists have observed that the
continents move apart or come together
at speeds of a few centimeters per
____.
a. century
b. decade
c. day
d. year
D 300
Scientists believe that differences in
____ cause hot, plastic-like rock in the
asthenosphere to rise toward Earth's
surface.
a. density
b. magnetism
c. weight
d. composition
D 400
Scientists believe that differences in
____ cause hot, plastic-like rock in the
asthenosphere to rise toward Earth's
surface.
a. density
D 400
The driving forces of tectonic plates
are related to convection currents in
Earth’s ____.
a. crust
b. mantle
c. inner core
d. outer core
D 500
The driving forces of tectonic plates
are related to convection currents in
Earth’s ____.
a. crust
b. mantle
c. inner core
d. outer core
D 500
____________________ occurs
when one tectonic plate descends
beneath another.
E 100
Subduction
E 100
Places where plates move apart are
________ plate boundaries.
E 200
divergent
E 200
The theory of ___________________
explains how new crust is created at
mid-ocean ridges.
E 300
seafloor spreading
E 300
The arrows in the mantle and oceanic crust
indicate the direction of flow of
_________________ beneath the plates.
E 400
convection currents
E 400
____________________ is the process
occurring in the area marked by the letter R.
E 500
Ridge push
E 500
Earth’s continents were once joined
as a single landmass called
____________________.
F 100
Pangaea
F 100
Plates come together at
_____________ plate
boundaries.
F 200
convergent
F 200
___________ plate boundaries
are places where plates slide
horizontally past each other.
F 300
Transform
F 300
A(n) ____________________ is used to
measure and record the magnetic
signature of the rocks on the seafloor.
F 400
magnetometer
F 400
____________________ is the process taking
place in the area marked by the letter S.
F 500
Slab pull
F 500
The Final Jeopardy Category is:
Plate Tectonics
Please record your wager.
Click on screen to begin
How does a mid-ocean ridge form?
Click on screen to continue
As the seafloor spreads apart, magma
moves upward and flows from the
cracks. It becomes solid as it cools
and forms new seafloor. As new
seafloor moves away from the ridge,
it cools, contracts, and becomes
denser than the material below it. This
dense, colder seafloor begins to sink,
helping to form the mid-ocean ridge.
Click on screen to continue
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