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Continental Drift & Seafloor Spreading (2023) Flashcards | StudBud
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Continental Drift & Seafloor Spreading (2023)
Continental Drift & Seafloor Spreading (2023)
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1
Why was "continental drift" rejected during Wegener's lifetime?
Wegener could not explain how the continents had moved
Wegener had no evidence for his hypothesis.
Wegener could not explain the Lystrosaurus.
Wegener could not explain the Mesosaurus.
2
This map shows the age of the ocean floor rocks. Red represents...
young rocks at trenches
old rocks at trenches
young rocks at mid-ocean ridges.
old rocks at mid-ocean ridges
3
How did Marie Tharp significantly prove continental drift?
She mapped the continents
She mapped the ocean floor
She engineered the first satellite.
She invented Global Positioning Systems (GPS)
4
Who developed the theory of seafloor spreading?
Harry Hess
Albert Einstein
Charles Darwin
Alfred Wegener
5
How did the use of sonar help Marie Tharp & others map the ocean floor?
anchors were dropped off of ships to measure distance
submarines took pictures
sound waves were used to detect sea creature movement
sound waves were used to measure the distance to an object
6
What are mid-ocean ridges?
long chains of mountains that rise up from the sea floor
areas where crust pushes together
baseball seams
areas where crust bends into the mantle
7
New oceanic crust is created at mid-ocean ridges.
True
False
8
What cold environment feature was evidence to support the theory that the continents used to be joined?
The same rocks were found on different continents
Fossilized evidence of the same organism found on different continents
Glacial grooves were found on different continents
Africa and South America look like puzzle pieces that fit together
9
Wegener’s hypothesis of continental drift was finally confirmed by
the formation of mountain ranges such as the Andes
evidence supporting the idea of sea-floor spreading
fossils from the same reptile found on two continents
continental coastlines that fit together
10
Which of the following is NOT used as evidence for the existence of the supercontinent Pangaea?
Shark fossils were found in Antarctica
Glossopertis fossils found across three continents
Glacial scratches on rocks in South Africa
Folded mountains on coastlines
11
The oceanic crust near the mid-ocean ridge is younger than the oceanic crust farther away from the ridge.
False
True
12
Why was "continental drift" rejected during Wegener's lifetime?
Wegener could not explain how the continents had moved
Wegener could not explain the Mesosaurus.
Wegener had no evidence for his hypothesis.
Wegener could not explain the Lystrosaurus.
13
What is happening at mid-ocean ridges?
plates are moving towards each other and pushing up
we still don't know
sea creatures are skiing down them
plates are moving away and new ocean floor is formed
14
What causes the seafloor to spread?
drifting continental crust
earthquakes
sinking magma from the mantle
rising magma from the mantle
15
What is Pangaea?
Earth's inner core
large landmass in which all continents were once connected
the largest fault found on Earth
the large landmass that all continents are currently forming
16
What was Alfred Wegener's hypothesis about the continents?
There have always been 7 distinct continents.
Mountain ranges formed when continental plates collided.
The continents rest on plates that move slowly over time
The continents were joined together and then drifted apart
17
What clue(s) supported the continental drift theory?
Similar rocks have been found on different continents
Fossils found on continents separated by oceans.
puzzle-like fit of all the continents
All of them
18
Evidence for the theory of continental drift was first proposed in 1912 by what German Scientist?
Alfred Marshall
Alfred Hitchcock
Alfred Nobel
Alfred Wegener
19
What geologic feature was evidence to support the theory that the continents used to be joined?
Glacial grooves were found on different continents
Same rocks were found on different continents
Africa and South America look like puzzle pieces that fit together
Fossilized evidence of the same organism found on different continents
20
What device used sound waves to help map the mid-ocean ridges in the mid- 1900s?
sonar
laser
seismograph
ridgeometer
