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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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#continentaldrift #seafloorspreading #wegener
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1
What is the name of the giant landmass the continents once formed?
Worldia
Gondwana
Laurasia
Pangaea
2
What does the theory of Continental Drift state?
Plants and animals can drift from one continent to another.
The continents on Earth have moved over millions of years.
The continents are moving closer together.
The continents drift from side to side.
3
When magma erupts from a mid-ocean ridge, it creates new ocean floor made of what type of rock?
igneous
metamorphic
sedimentary
lava
4
What motion of the magma (the circulation) in the asthenosphere causes plates to move?
subduction
sinking
lithosphere
convection
5
What do we call the top layer of the crust?
asthenosphere
core
lithosphere
mantle
6
What type of lava exits a mid-ocean ridge and hardens in the ocean?
underwater lava
squishy lava
pillow lava
black lava
7
What proof did Wegener discover to prove his theory?
Mountains from 2 different continents that could connect.
All of these!
Glacial grooves on rocks in warmer continents.
The same fossils on multiple continents
8
What is an underwater mountain range in which magma exits to cause seafloor spreading?
mid-ocean ridge
ocean mountains
underwater volcano
mid-ocean mountains
9
How do the continents move, as discovered by Hess?
Oceans Moving
Seafloor Spreading
Sea Moves
Spreading of the Sea
10
Who is the scientist that continued Wegener's studies and helped prove HOW the continents move?
Henry Hass
Harry Hess
Jimmy
Albert Einstein
11
In what year was the theory of Continental Drift FINALLY accepted by society?
1945
2003
1960
1912
12
What do we call the liquid part (lower part) of the mantle?
core
crust
lithosphere
asthenosphere
13
Why didn't people believe Wegener's theory of Continental Drift?
He did not explain HOW the continents moved.
He didn't give evidence.
He was known to be a liar.
He was legitimately crazy!
14
When tectonic plates sink underneath another plate, it is called...?
plate sinking
seafloor spreading
asthenosphere
subduction
15
About how many years ago is Pangaea thought to have existed?
225 million years ago
125 million years ago
250 million years ago
2 years ago
16
Who is the scientist that first proposed the theory of Continental Drift?
Alfred Wegener
Albert Einstein
Bill Nye
Harry Hess
