ertsay

Question 1

The ____ states ocean being that crust formed at mid-ocean ridges and destroyed at deep-sea trenches”.

Answer 1

Sea floor
spreading theory

Question 2

is a geologic
process of the movement of two oceanic
plates, splitting apart from each other at
a divergent plate boundary.

Answer 2

Seafloor spreading

Question 3

Seafloor spreading is a geologic
process of the movement of two oceanic
plates, splitting apart from each other at
a

Answer 3

divergent plate boundary.

Question 4

It results in
the formation of new oceanic crust from
magma that comes from within the

Answer 4

Earth’s mantle along a mid- ocean ridge.

Question 5

carry heat
from the lower mantle and core to the
lithosphere.

Answer 5

Convection currents

Question 6

Convection currents also
reutilize ___________ back to the mantle

Answer 6

lithospheric materials

Question 7

As tectonic
plates gradually distance from each other, heat from the mantle’s convection
currents makes the crust more plastic and less dense. The less-dense material ______,
often forming a mountain or elevated area of the seafloor.

Answer 7

rises

Question 8

As a result, the crust cracks. Hot magma powered by mantle convection
bubbles up to fill these fractures and spills onto the crust. This bubbled-up magma
is cooled by _________ to form igneous rock. This rock (basalt) becomes a new
part of Earth’s crust.

Answer 8

frigid seawater

Question 9

As a result, the crust cracks. Hot magma powered by mantle convection
bubbles up to fill these fractures and spills onto the crust. This bubbled-up magma
is cooled by frigid seawater to form igneous rock. This _________ becomes a new
part of Earth’s crust.

Answer 9

rock (basalt)

Question 10

It is the process by which the ocean floor sinks beneath a deep-ocean
trench and back into the mantle, and allows part of the ocean floor to sink back
into the mantle.

Answer 10

Seafloor Spreading Subduction

Question 11

is the largest depression of land surface on Earth under an
ocean.

Answer 11

Ocean basin

Question 12

happens along the boundaries of tectonic plates that
are moving apart from each other. These areas are called mid-ocean ridges.

Answer 12

Seafloor spreading

Question 13

happens along the boundaries of tectonic plates that are
crashing into each other.

Answer 13

Subduction

Question 14

In these subduction zones, the __________ moves
underneath, or subducts, the ___________. Ocean basins that experience
subduction, such as the Pacific basin, are shrinking.

Answer 14

heavier plate, lighter one

Question 15

Oceanic basin landforms have two main characteristics namely:

Answer 15

1) Ocean
basin is a land that exists under an ocean; and 2) It includes all topographical
features.

Question 16

It is a shallow gently sloping part of the continental crust that borders the
continents. It has an average depth of 130 m, and its width varies from tens of
meters to a maximum of about 1, 300 km.

Answer 16

Continental shelf

Question 17

It extends from the continental shelf at an average depth of 135 meters.
The base is steeply sloping and occurs at a depth of approximately 2000 meters
that marks the edge of the continents. The width of the slope varies from 20 to 100
kilometers.

Answer 17

Continental slope

Question 18

The V-shaped canyon that cuts into the continental slope to a depth of up
to 1200 meters. It cuts perpendicular to the running direction of the continental
slope.

Answer 18

Submarine canyon

Question 19

It is found at the base of the continental slope. The depth ranges from 2000
to 5000 meters deep, and the width is up to 300 kilometers. Continental rise is
created by the merging of accumulated deposit at the mouth of the many
submarine canyons.

Answer 19

Continental rise

Question 20

It is the canyon’s thick fan-shaped sedimentary deposits.

Answer 20

Abyssal fan

Question 21

It is found at the base of the continental rise in water, ranging from 4 000 to
6 000 meters deep. Ocean floor accounts for nearly 30 % of the Earth’s surface,
consisting of thin layer of basaltic rock

Answer 21

Ocean floor

Question 22

This layer combines the rigid
crust plus the upper-most mantle.

Answer 22

Lithosphere:

Question 23

Partially molten part of
upper mantle. Tectonic plates are able to
move about on top of the softer, partially
molten asthenosphere.

Answer 23

Asthenosphere:

Question 24

The Core is at the center of the Earth. It is
divided into an inner and outer core.

Question 25

is the layer surrounding the
core.

Answer 25

2. The Mantle

Question 26

is the rigid outermost layer

Answer 26

3. The Crust, or lithosphere,

Question 27

The upper mantle is partially molten
and called the

Answer 27

asthenosphere.

Question 28

is a scientific theory which describes the large-scale motions
of Earth’s lithosphere.

Answer 28

Plate tectonics

Question 29

There are three types of plate movement:

Answer 29

the converging,
diverging or transversing against one another

Question 30

Folding is a tectonic activity that results in the formation of _________, such as the Himalayas,

Answer 30

Fold
Mountains

Question 31

is formed from faulting.

Answer 31

Rift Valley,

Question 32

are created when two continental crusts collide.

Answer 32

Mountain belts

Question 33

is also formed along the subduction zone.

Answer 33

Trench

Question 34

Divergence of ___________ occur mostly as mid-ocean ridges
where normal faults can be found.

Answer 34

plate boundaries

Question 35

divergence within _____________ leads to the formation of rift valleys.

Answer 35

continental
crusts

Question 36

form the strike-slip fault and frequent
earthquakes occur.

Answer 36

Transform plate boundaries

Question 37

Seafloor spreading happens along the boundaries of tectonic plates that
are moving apart from each other. These areas are called

Answer 37

mid-ocean ridges.