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Continental Drift and Seafloor Spreading Flashcards | StudBud
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Continental Drift and Seafloor Spreading
Continental Drift and Seafloor Spreading
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Continental drift and seafloor spreading, including Wegener and Hess; quiz prep
Flashcards
28 cards
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Questions
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Answers
1
Coal fields in ______________ and ____________ match up.
North America and South America
Africa and Australia
Europe and Africa
Europe and North America
2
Which 2 continents have mountain ranges with similar rock & structure, used as evidence of CD?
Australia and India
North America and Russia
Africa and South America
South America and India
3
What two continents fit together most noticeably and were evidence for the original theory?
South America and Europed
Antarctica and Africa
Africa and North America
South America and Africa
4
Who is the person credited with developing the theory of continental drift?
H. Hess
C. Drift
A. Wegener
A. Einstein
5
When one tectonic plate _____ under another and sinks back into the mantle.
falls
subducts
rises
6
What causes the crust to move?
tension
convection
radiation
concudction
7
In sea-floor spreading, where does the new crust come from?
It comes from glaciers.
It comes from solid material.
It comes from molten material.
It comes the sun.
8
Wegener could not explain ____________________.
the size of the continents
what made the continents move
how climates changed
how oceans were created
9
What do the lines in our model stand for?
magnetic stripes
sonar readings
A line
longitude and latitude
10
Magma, or molten material, ____ and hardens.
cools
shrinks
warms
11
True or False? The Pacific Ocean is shrinking.
True
False
12
A freshwater reptile fossil found by Wegener was called ________________.
Tyranosaurus
Glossopteris
Reptosaraus
Mesosaurus
13
The process by which molten material adds new oceanic crust to the ocean floor is called?
ocean growing
Deep Ocean trenching
Seafloor Spreading
The seafloor cracking apart
14
The fern-like plant fossil Wegener discovered was called ________________
Cynognathus
Lystrosaurus
Glossopteris
Mesosaurus
15
True or False? Sea-floor spreading takes place in a lake.
False
True
16
Sea-floor spreading begins at the___.
deep ocean trench
mid-ocean ridge
continent's edge
17
Land feature that happens when there is subduction is called a ____
mid-ocean ridge
deep-ocean trench
asthenosphere
18
Alfred Wegener said Pangaea broke apart about _______________ .
3.0 million years ago
300 million years ago
300,000 years ago
300 years ago
19
Who proposed the theory of sea-floor spreading?
H. Alfred
H. Hess
A. Wegener
H. Howard
20
What was the name given to the "super continent"?
Gondwana
Laurasia
Pangaea
Papua New Guinnea
21
Which is
NOT
evidence of sea-floor spreading?
magnetic stripes
molten magma constantly erupting
drilling samples of rock
fossil evidence
22
The process which more dense crust sinks beneath less dense crust and band back into the mantle
mid-ocean ridge
sea-floor spreading
subduction
23
What evidence helps scientists show how sea floor spreading occurs?
magnetic stripes
all of the above
drilling samples
ocean floor material
24
What happens when subduction occurs?
parts of the crust fall into space
none of the above
parts of the crust fall into the mantle
parts of the crust fall into the core
25
What are mid-ocean ridges?
a chain of underwater rocks
a chain of underwater waterfalls
a chain of underwater mountains
a chain of underwater volcanoes
26
What is sonar?
A device that is used to create mid-ocean ridges.
A device used by scientists to map mid-ocean ridges.
A device used by scientists to map seafloor spreading.
27
The
oldest
seafloor is located _____?
closest to the mid-ocean ridge
farthest from the mid-ocean ridge
28
New crust is always formed at the ____
deep-ocean trench
mid-ocean ridge
asthenosphere
