What occurs at a subduction zone?

Denser oceanic plate goes under less dense continental plate

What is Seafloor Spreading?

occurs @ ridges where new crust forms & graduallymoves away

Which one of the following statements is NOT evidence supporting Continental Drift?

Seafloor Spreading where older rock is found far from ridge

Why was Wegener's Continental Drift theory rejected by scientists in the early 1900s?

Wegener could not explain how the continents moved.

3 truths and a lie. Which one does not support the idea of sea floor spreading

climatic evidence -glacial debris

Sea floor spreading is causing

the Atlantic ocean gets larger & the Pacific Ocean to shrink

What are magnetic reversals?

The magnetic field changes & the north pole is the south

With Sea Floor Spreading where are the youngest rocks found?

Closest along the edges of the opening

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Continental Drift

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Continental drift and sea floor spreading

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Questions 16

Answers

1
What occurs at a subduction zone?
Denser continental plate goes under less dense oceanic plate
Less dense continental plate goes under denser oceanic plate
Denser oceanic plate goes under less dense continental plate
Less dense oceanic plate goes under denser continental plate
2
What is Seafloor Spreading?
plates coming together to form trenches
the gradual erosion of water forming canyons
when the oceans get larger
occurs @ ridges where new crust forms & graduallymoves away
3
Which one of the following statements is NOT evidence supporting Continental Drift?
Rock layers and formations line up on matching coastlines
Fossils of same animals found on different continents
Seafloor Spreading where older rock is found far from ridge
Continental coastlines fit together like puzzle pieces
4
The layer of the Earth identified with the number 2 in the picture is:
Lithosphere/crust
Asthenosphere/Mantle
Outer Core
Inner Core
5
Why was Wegener's Continental Drift theory rejected by scientists in the early 1900s?
Wegener could not explain how the continents moved.
Wegener had no evidence.
Wegener was a stupid stupid man.
The other scientists did not understand it.
6
The layer of the Earth identified with the number 1 in the picture is:
Outer Core
Inner Core
Asthenosphere/Mantle
Lithosphere/crust
7
3 truths and a lie. Which one does not support the idea of sea floor spreading
deep sea drilling
Patterns of magnetic reversal
climatic evidence -glacial debris
Mid Ocean ridges
8
The name of the Super-continent which all of the contents once formed is
Pacifica
Gondwana
Pangaea
Laurasia
9
The layer of the Earth identified with the number 4 in the picture is:
Inner Core
Asthenosphere/Mantle
Lithosphere/crust
Outer Core
10
The layer of the Earth identified with the number 3 in the picture is:
Lithosphere/crust
Outer Core
Asthenosphere/Mantle
Inner Core
11
Sea floor spreading is causing
the Atlantic ocean gets larger & the Pacific Ocean to shrink
the Atlantic & Pacific ocean stay the same size
the Pacific ocean gets larger & the Atlantic Ocean to shrink
the Atlantic ocean gets hotter & the Pacific Ocean cooler
12
Who discovered Sea Floor Spreading?
Harry Hess
Poseidon
Alfred Wegener
Arthur Holmes
13
What is the result of seafloor spreading?
hurricanes
trenches
ridges
volcanoes
14
What are magnetic reversals?
The magnetic field stops working
The rocks switch places in the magnetic field
The magnetic field changes & the north pole is the south
The magnetic field weakens
15
What forms at Divergent Boundaries?
Trenches
Earthquakes
Ridges
Mountains
16
With Sea Floor Spreading where are the youngest rocks found?
in the opening.
Furthest from the opening
At the ends of the opening
Closest along the edges of the opening

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