What is Sea Floor spreading?

Process of tectonic plates splitting apart

what happens to oceanic crust at a mid ocean ridge

it forms new mountains under water

Give examples of divergent plate boundaries

Mid-Atlantic Ridge, Iceland, Great African Rift Valley

what is one piece of evidence that caused Wegener to think that continents moved?

he found similar fossils on different continents that are separated

What conditions allow rock in the mantle to flow?

hot rock being less dense and rising

What are the types of plate boundaries?

Convergent, divergent, transform

A long chain of mountains in the ocean

What are transform plate boundaries?

Plates that move past each other

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Chapter 5 test Review

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convection in the mantle sea floor spreading plate tectonics plate boundaries

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Questions 26

Answers

1
What is Sea Floor spreading?
Process of tectonic plates splitting apart
Process of tectonic plates coming together
Process of Processing Processes
Answer 4
2
what did Wegener think happens during continental drift?
the mantle warms
continents move
convection stops
continents freeze
3
What is the transfer of heat by direct contact?
pressure
radiation
conduction
convection
4
what happens to oceanic crust at a mid ocean ridge
it forms new mountains under water
it is so dense that gravity pulls it into a deep-ocean trench
it gets hotter and sinks into a trench
5
At what point does magma become lava?
at Earth's surface
Inner core
in the mantle
Never
6
at which plate boundary do two plate pull apart
divergent
transform
convergent
7
What are convergent plate boundaries?
Plates that move apart
Plates that don't move around at all
Plates the move together
Plates that move past each other
8
what type of landforms occur at convergent plate boundaries
mountains
valleys
subduction zones
9
Give examples of divergent plate boundaries
Mid-Atlantic Ridge
Iceland
Great African Rift Valley
Mid-Ocean Ridge
10
which type of plate boundary occurs with oceanic crust and continental crust colliding
convergent
transform
divergent
11
which type of plate boundary forms faults and causes earthquakes
convergent
transform
divergent
12
Wegener thought that all continents were joined together to make a super continent called
Eurasia
Pangea
North Africa
The United States of the world
13
which of the following is evidence of sea-floor speading
magnetic strips
changes in climate in Africa
new rock formations under the oceanic floor
pieces of different crust found on different continents
14
what is one piece of evidence that caused Wegener to think that continents moved?
he watched the continents with his own eyes.
he proved his hypothesis with an experiment that measured movement
he found similar fossils on different continents that are separated
he found an old map of the world that showed movement
15
what force causes the movement of Earth's plates
convection currents
pressure
sound waves
cooling
16
when a divergent boundary occurs on land, it forms a
fault
rift valley
volcano
mountain
17
Where does new crust form in the ocean?
on top of the ocean floor
bottom of ocean floor
middle of ocean floor
new crust does not form
18
convection currents occur in
Outer core
Mantle
19
What conditions allow rock in the mantle to flow?
cold rock being less dense and rising
cold rock being more dense rising
hot rock being less dense and rising
hot rock being more dense and sinking
20
The magma the creates new sea floor comes up from the
inner core
asthenosphere
lithosphere
lower mantle
21
What are the types of plate boundaries?
Converging, diverging, transforming
Convergent, divergent, transform
Converge, diverge, transform
Converging, diverging, transform
22
A mid ocean ridge is
a long chain of volcanos in the ocean
an area where subduction stops
area of divergent plate boundaries
A long chain of mountains in the ocean
23
in which area does subduction of the ocean floor take place?
rift valleys
mid-ocean ridges
deep-ocean trenches
the lower mantle
24
What are transform plate boundaries?
Plates that don't move at all
Plates that move past each other
Plates that move apart
Plates that move together
25
What are divergent plate boundaries?
Plates that move apart
Plates that don't move at all
Plates that move together
Plates that move past each other
26
What fuels Sea Floor Spreading?
The Crust
Subducting
Convection Currents
Convergent Boundary

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