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Earth Science - Continental Drift, Sea Floor Spreading, Plate Tectonics Flashcards | StudBud
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Earth Science - Continental Drift, Sea Floor Spreading, Plate Tectonics
Earth Science - Continental Drift, Sea Floor Spreading, Plate Tectonics
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8th grade science
Flashcards
20 cards
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Questions
20
Answers
1
The lithosphere is broken into sections called...
continents
crust
land
plates
2
_________ is an underwater mountain range where new ocean floor is produced.
subduction
mid-ocean ridge
continental drift
deep ocean trench
3
Subduction is....
the direct transfer of heat through solids materials
a device that bounces sound wave off underwater objects
process by which oceanic crust sinks beneath the trenches
the process that continually adds ocean floor
4
Why are Mesosaurus fossils a good type of evidence for Continental Drift?
They were organisms that lived a long time.
They were very old
They were organisms that could not swim over the ocean
They were many types of fossils
5
What was that hypothesis which stated that continents were once joined?
sea-floor spreading
pangaea
continental drift
plate tectonics
6
The densest layer in the Earth is?
crust
outer core
inner core
mantle
7
What fossil was found on all 5 continents?
Glossopteris
Mesosaurus
Plateosaurus
Rhynchosaur
8
With sea-floor spreading, the oldest layers of rock are near....
mid-ocean ridge
trenches
coastlines
beaches
9
Where is new crust created?
trenches
mid-ocean ridge
coastlines
north pole
10
Why is the oldest ocean crust only 200 million years old?
the core destroys it
it lies about its age
old crust is melted into the mantle
aliens
11
What's one thing scientists noticed when viewing the mid-ocean ridge?
old crust
magma rising up
plate tectonics
convection currents
12
The Atlantic Ocean is expanding.
True
False
13
Which of the following provided evidence for sea-floor spreading?
magnetic stripes
climate
volcanos
fossils
14
What was that one super continent called?
Gondwanland
Pangaea
Laurasia
15
____ is a device that bounces sound waves off underwater objects and then records these echoes.
subduction
seismograph
sea-floor spreading
sonar
16
Why was Wegener's Theory Rejected?
He could not tell how the continents moved
He used incorrect evidence
People thought he was sick
He had no fossil evidence
17
Which layer of the Earth is a liquid?
inner core
mantle
crust
outer core
18
The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle
deep ocean trench
mid-ocean ridgw
sea-floor spreading
subduction
19
Which of the following is NOT evidence of Continental Drift?
Mountain ranges on S. America and Africa
sea floor spreading
Coal in Europe and N. America
Fossils on multiple continents
20
Alfred Wegener came up with the idea of...
p waves
earthquakes
sea floor spreading
continental drift
