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PLATE TECTONICS REVIEW
QUESTION 1

The ____________ is (are) an example of a
transform boundary.
Appalachian Mountains
 San Andreas Fault
 Mid-Atlantic Ridge
 Himalaya

ANSWER 1

San Andreas Fault
QUESTION 2

On which of Earth’s layers do we live?
ANSWER 2

the crust
QUESTION 3

Which geologic feature was most likely formed
when two lithospheric plates collided?
Grand Canyon
 Lake Michigan
 Sierra Madre mountain range
 Mississippi River delta

ANSWER 3

Sierra Madre mountain range
QUESTION 4

Where can the result of plate movement be
seen?
ANSWER 4

at plate boundaries
QUESTION 5

The Great Rift Valley in Africa is a ________
boundary.
ANSWER 5

divergent
QUESTION 6

Which layer of the Earth
is made mostly of liquid
metal?
ANSWER 6

layer 3
QUESTION 7

Plates slide past one another at ________
boundaries.
ANSWER 7

transform
QUESTION 8
The Himalaya Mountains formed from a
collision of the Indo-Australian plate with the
Eurasion plate. Which best approximates the
rate of movement of the Indo-Australian plate?
 0.67 mm per year
 6.7 cm per year
 6.7 meters per year
 67 meters per year

ANSWER 8

6.7 cm per year
QUESTION 9

The thickest layer of the Earth contains about
80% of the volume of Earth. What is this layer?
ANSWER 9

the mantle
QUESTION 10

Plates move apart at __________ boundaries.
ANSWER 10

divergent
QUESTION 11

The crust and upper mantle make up Earth’s
_________________.
ANSWER 11

lithosphere
QUESTION 12

Scientists theorize that
millions of years ago
South America and Africa
formed a single land
mass.
QUESTION 12
Which statement best describes why South
America and Africa are now thousands of miles
apart?
 Strong winds continually pushed the land masses
away from each other.
 Ocean currents carried some land masses east
and some west.
 Lithospheric plates moved the continents apart at
a rate of centimeters per year
 Tectonic plates slid together forming mountains
that forced the continents apart.

ANSWER 12

Lithospheric plates moved the continents apart
at a rate of centimeters per year
QUESTION 13
The Andes Mountains of South America were
gradually formed when the Nazca and South
American tectonic plates collided. Which of
these caused this collision?
 movement of the material in Earth’s core
 changes in Earth’s magnetic field
 convection currents in the Earth’s mantle
 volcanic activity in the Earth’s crust

ANSWER 13

convection currents in Earth’s mantle
QUESTION 14

Which layer of Earth is composed mainly of
liquid water and different types of rock crystals
such as quartz?
ANSWER 14

the crust
QUESTION 15
Which is the best description of where
earthquakes are likely to occur?
 along a coastline
 in the middle of an ocean
 in the middle of a continent
 along two plate boundaries

ANSWER 15

along two plate boundaries
QUESTION 16
Scientists place devices for communicating
with satellites on the edge of continents. Two
devices were placed on continents where
lithospheric plates are moving apart. If these
lithospheric plates are moving at a typical rate,
about how much farther apart from each other
will the devices be in 10 years?
 1 cm, 100 cm, 10 m, or 1 km

ANSWER 16

100 centimeters
QUESTION 17
Active volcanoes are most likely to form at
______________.
 the center of continents
 convergent oceanic-continental boundaries
 transform boundaries
 divergent boundaries

ANSWER 17

convergent oceanic-continental boundaries
QUESTION 18

The thinnest layer of the Earth ranges in
thickness between 7 kilometers and 70
kilometers. Which layer is being described?
ANSWER 18

the crust
QUESTION 19

Scientists have observed that the plates move
at rates ranging from 1 cm to 12 cm per
__________.
ANSWER 19

year
QUESTION 20

_______________ are formed when two
continental plates collide.
ANSWER 20

mountain ranges
QUESTION 21
Which of these best describes the composition
of the inner core of Earth?
 solid iron and nickel
 liquid iron and nickel
 carbon dioxide and ice
 quartz and oxygen

ANSWER 21

solid iron and nickel
QUESTION 22

The boundary between two plates moving
together is called a _____________ boundary.
ANSWER 22

convergent
QUESTION 23
Scientists theorize that the Atlantic Ocean is
slowly increasing in width. Which is the best
approximation of the rate at which lithospheric
plates beneath the Atlantic Ocean are moving?
 2 mm per year
 2 cm per year
 2 meters per year
 2 km per year

ANSWER 23

2 centimeters per year