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Unit 4 Post Test Earth Structures Sea Floor Spreading Layers of the Earth Mid Ocean Ridge Flashcards | StudBud
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Unit 4 Post Test Earth Structures Sea Floor Spreading Layers of the Earth Mid Ocean Ridge
Unit 4 Post Test Earth Structures Sea Floor Spreading Layers of the Earth Mid Ocean Ridge
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1
What is happening at the mid-Atlantic ridge that provides evidence for continental drift?
frequent volcanic eruptions that often cause tsunamis
a slip fault boundary
fossils are being churned up as a result of many earthquakes
seafloor spreading
2
What did Harry Hess discover that led to understanding how plate tectonics occurs?
the flooring of the previous ocean-floor becomes older as the new comes in
he was able to venture to depths that no one else had been able to see
the age of the ocean floor becomes younger as you move away from the ridge
the sea floor is really not flat at all
3
Scientists think that convection currents flow in Earth's
inner core
continents
lithosphere
mantle
4
Where would the least dense layer of the Earth be found?
Inner core
Outer core
Crust
Mantle
5
Most geologists think that the movement of Earth's plates is caused by
earthquakes
Earth's magnetic field
conduction
convection currents in the mantle
6
Earths outer core is
a layer of rock that forms earths outer skin
a layer of hot rock
A layer of liquid iron and Nickle
a dense ball of solid metal
7
The geological theory that states that pieces of Earth's lithosphere are in constant, slow motion is the theory of
sea-floor spreading
plate tectonics
subduction
deep-ocean trenches
8
The process of one plate moving under another and eventually being "recycled" into the earth is called:
subduction
divergence
tectonics
drift
9
The old oceanic crust is denser than the new oceanic crust because it is
Hot, new rock
moving toward a deep-ocean trench
cooled overtime
closer to the mid-ocean ridge
10
A place where two plates slip past each other, moving in opposite directions, is known as a
sliding/transform boundary
rift valley
spreading/divergent boundary
colliding/convergent boundary
11
Earth's mantle is
a layer of hot rock
a layer of molten metal
a layer of rock that forms Earth's outer skin
a dense ball of solid metal
12
Which rock is most dense?
Shale
Limestone
Granite
Basalt
13
What did mapping the world's earthquakes and volcanoes help scientists discover
where the edges of the plates are
how deep each layer of the Earth is
what state of matter each layer of the Earth is
why this inner core is so hot
14
When two continental plates collide, what is most likely to occur?
an earthquake
volcanic eruptions
a mid ocean ridge is formed
mountain formation
15
Which layer of the earth is resting upon these tectonic plates?
inner core
outer core
crust
mantle
16
What did tracking the movement of p-waves and s-waves help scientists discover?
What state of matter each layer of the Earth is
How hot each layer is
where the edges of the plates are
why so many earthquakes occur in California
17
Mid-ocean ridges are
found only in the Pacific Ocean
found in all of Earth's oceans
located mostly along coastlines
long deep-ocean trenches
18
How did scientist discover that rocks farther away from the mid-ocean ridge were older than those near it?
by observing eruptions of molten material on the sea floor
by mapping rocks on the sea floor using sonar
By measuring how fast sea-floor spreading occurs
by determining the age of rock samples obtained by drilling on the seafloor
19
A collision between two pieces of continental crust at a colliding/convergent boundary produces a
deep-ocean trench
mid-ocean ridge
mountain range
rift valley
20
A mid-ocean ridge forms a
colliding/convergent boundary
sliding/Transform bouindary
spreading/divergent boundary
Deep-ocean trench
21
In sea-floor spreading, molten material rises from the mantle and erupts.
along mid-ocean ridges
in deep-ocean trenches
at north and south poles
along the edges of all continents
22
What recent theory provides the explanation that Wegener could not provide for how the continents move?
evolution
continental drift
plate tectonics
mass extinction
23
The place where two plates comes together represented by the letter A in the diagram is known as.
sliding/transform boundary
spreading/divergent boundary
rift valley boundary
colliding/convergent boundary
24
What process is illustrated by this picture?
collision
seafloor spreading
subduction
erosion
25
The relatively soft layer of the upper mantle is the
asthenosphere
continental crust
lithossphere
inner core
26
When an oceanic plate collides with a continental plate, what is most likely to occur?
trench formation and volcanic eruptions
mountain formation
an earthquake
a mid ocean ridge is formed
27
Which type of evidence was used by Alfred Wegener to support his continental drift hypothesis
evidence from water
evidence from human remains
evidence from other scientists
evidence from landforms
28
Geologist obtain indirect evidence about Earth's interior by ....
estimating temperature inside Earth
measuring pressure differences at Earth's surface.
recording and studying seismic waves
directly looking under the many layers
29
Most geologists rejected Alfred Wegener's idea of continental drift because
Wegener used several different types of evidence to support his hypothesis
they were afraid of a new idea
Wegener could not identify a force that could move the continents
Wegener was interested in what Earth was like miliions of years ago
30
Which of the following was NOT one of the reasons Wegener believed the continents were once connected?
mountain ranges overlapping continents
patterns in where earthquakes and volcanoes occur
glacier markings in the desert
coal deposits in the arctic
31
Using data from seismic waves, geologists have learned that Earth's interior is made up of several
trenches
layers
continents
ridges
32
When the heat source is applied to a fluid, convection currents in the fluid will
continue at the same rate forever
speed up
change direction
eventually stop
33
Which type of evidence was used by Alfred Wegener to support his continental drift hypothesis?
Glacier markings and coal deposits
mountain ranges
fossils
All the above
34
Why do 75%of the Earth's volcanoes and 95% of the world's earthquakes occur in the ring of fire?
Because that area of the world is hotter
Because it is the deepest part of the Earth
Because that area is covered entirely by water
Because in that area several plates come together
35
Holes drilled several kilometers into Earth's crust provide direct evidence about Earth's interior in the form of
liquid iron
rock samples
seismic waves
volcanic eruption
36
The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is known as
Subduction
continental drift
convection
conduction
37
What is the correct order[starting from the surface] of Earth's layers?
outer core, inner core, crust, mantle
crust, mantle, outer core, inner core
crust, outer core, inner core, mantle
mantle, outer core, inner core, crust
38
Oceanic crust is made mostly of what material
iron
basalt
granite
nickle
