SCIENCE 1st summative

Question 1

the seafloor was formed by
mid-ocean ridges that
spread in both directions.

Answer 1

Seafloor Spreading Theory

Question 2

geologic process that takes place
when tectonic plates diverge,
resulting in the creation of new
ocean floors.

Answer 2

Seafloor Spreading Theory

Question 3

an American geologist,
professor, and military officer,
proposed the seafloor spreading
theory in 1960s.

Answer 3

Harry Hess

Question 4

a scientist with the US coast and
Geodetic Survey, coined the term
“seafloor spreading”

Answer 4

Robert S. Dietz

Question 5

are areas
where tectonic plates dive
beneath other plates into
the earth’s interior.

Answer 5

Subduction zones

Question 6

It occurs when two plates push
against each other. While one plate
dives beneath another, the crust is
destroyed and recycled back into
the earth’s interior.

Answer 6

(Colliding Boundary)

Convergent

Question 7

this boundary also known as the
destructive plate boundary.

Answer 7

(Colliding Boundary)

Convergent

Question 8

____________________________ ________________ boundaries
occur when two continental plates move towards
each other. Both plates are less dense, so neither
subducts under the other. Instead, the plates
collide and push upwards forming large mountain
ranges.

Answer 8

Continental-to-continental
convergent

Question 9

When oceanic crust collides with a continent, an
_____________________________________ _____________boundary forms.
The oceanic plate is denser, so it undergoes
subduction. This means that the oceanic plate sinks
beneath the continent, forming a deep ocean trench

Answer 9

Oceanic-to-continental
convergent

Question 10

occurs location where two oceanic plates
come together and the denser plate
sinks, or subducts, beneath the less
dense plate, forming a deep ocean trench

Answer 10

Oceanic-to-oceanic

Question 11

unlike the two boundary types, _________ _____neither creates nor destroys a crust,
hence it is also called conservative boundary

Answer 11

(Lateral Boundary)

Transform Fault

Question 12

is a zone
where two lithospheric plates
move apart from each other.

Answer 12

A divergent boundary

Question 13

this boundary also known as the
constructive plate boundary.

Answer 13

(Spreading Boundary)

Divergent

Question 14

What really is
inside the Earth?
Mechanically

Answer 14

Lithosphere,
Asthenosphere, Mesospheric mantle,
Outer core, and Inner core.

Question 15

The structure of Earth can be defined

Answer 15

mechanically or chemically.

Question 16

is the study of the flow of matter
primarily in the liquid state under
conditions at which they respond with
plastic flow rather than deforming
elastically in response to an applied
force.

Answer 16

RHEOLOGY

Question 17

is the outermost layer of the Earth.

Answer 17

CRUST

Question 18

The earth is divided into three main layers namely the

Answer 18

Crust, the mantle and the core.

Question 19

What really is
inside the Earth? Chemically:

Answer 19

Crust, Upper Mantle, Lower
Mantle, Outer Core, and Inner Core.

Question 20

it is the thinnest layer, ranging from about 5 to 70 kilometers in thickness.

Answer 20

CRUST

Question 21

is the thicker layer of the Earth’s crust that is found under the continents. It is about 35 kilometers thick on average.

Answer 21

continental crust

Question 22

is the thinner layer of the Earth’s crust that is found under the ocean basins. It is about 7 kilometers thick on average.

Answer 22

oceanic crust.

Question 23

The crust can be further divided into two types

Answer 23

continental crust and oceanic crust.

Question 24

The mantle can be divided into an

Answer 24

upper and lower layer.

Question 25

It is the thickest layer, extending from the base of the crust to a depth of approximately 2,900 kilometers.

Answer 25

MANTLE

Question 26

is the layer beneath the Earth’s crust.

Answer 26

MANTLE

Question 27

Is seen as a
highly viscous layer which lies
between the crust and the
lower mantle.

Answer 27

The upper mantle

Question 28

extends
from just under the upper
mantle to 2,200 km.

Answer 28

The lower mantle

Question 29

is the innermost layer of the Earth, situated beneath the mantle.

Answer 29

CORE

Question 30

Rocks at the _______ _______are hot and soft.

Answer 30

LOWER MANTLE

Question 31

Rocks in the _______ _______ are cooler and brittle enough to break under
stress.

Answer 31

UPPER MANTLE

Question 32

It is divided into two distinct regions

Answer 32

the outer core and the inner core.

Question 33

represents
about 4% of the mantle-crust
mass.

Answer 33

OUTER CORE

Question 34

can be found at the
deepest region of the planet.

Answer 34

INNER CORE

Question 35

It can be regarded as a
ball of very hot metals.

Answer 35

OUTER CORE

Question 36

It is
characterized by an extremely high
temperature of about 5,000-6,000
degree Celsius or even higher than the
temperature at the sun’s surface

Answer 36

INNER CORE