Continental drift is:

continents once formed a single landmass and drifted

When molten material adds new oceanic crust to the ocean floor

Laurasia and Gondwana were:

the two continents after pangaea

What is magnetic reversal?

The process of north and south magnetic poles switching places

Why did many scientistis reject Wagner's hypothesis of continetal drift?

based on the calculated strength of the rocks. it didn't seem possible

What evidence did Wegener have for continental drift?

Fossils, rock types, puzzle shape of land

What do we know what happened to the Pangaea?

the landmass broke up into new continents

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SCIENCE CHAPTER 7 SECTION 2

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1
Continental drift is:
the hypothesis states new oceanic lithosphere forms from one large landmass
the hypothesis states there were three large landmasses
continents once formed two large land masses and moved north
continents once formed a single landmass and drifted
2
Sea-floor spreading:
a valley formed by the separation of tectonic plates
a valley formed by the separation of tectonic plates
When molten plant life adds new oceanic crust to the ocean floor
When molten material adds new oceanic crust to the ocean floor
3
Laurasia and Gondwana were:
dinosaurs with big noses
primitive mammals
the two oceans after panthalassa
the two continents after pangaea
4
Evidence that supported the theory of continental drift.
puzzle-like fit of all the continents
identical fossils found on continents separated by oceans
all of the above
similar land forms have been found on different continents
5
What is magnetic reversal?
The process of north and south magnetic poles switching places
When the magnetic north/south is on the equator
When the Earth's core starts spinning the wrong way
When the solar winds push the magnetism away from the Earth.
6
Who proposed the theory of continental drift?
Alfred Wegener
Johannes Bach
Marie Tharp
Ms. Michaels
7
Why did many scientistis reject Wagner's hypothesis of continetal drift?
based on the rocks, it seems that they had magnetic charges
based on the calculated strength of the rocks. it didn't seem possible
based on the calculated strength of the volcanic blasts, it wasn't possible
based on the rocks being in different locations it didn't seem possible.
8
What evidence did Wegener have for continental drift?
rock types, earthquake location, magnetic striping
Fossils, rock types, puzzle shape of land
seafloor spreading, volcano locations
magnetic striping, fossils, puzzle shape of land
9
Mid-ocean ridges are places where the sea-floor is:
colliding
none of the above
spreading apart
sliding past each other
10
What do we know what happened to the Pangaea?
the landmass was covered by ocean
the landmass stayed in the same position
the landmass broke up into new continents
the landmass broke up and reformed
11
What is Pangaea...?
Water
Volcano
Land
Super continent
12
What happens when magma rises to the Earth's surface and solidifies?
underwater earthquakes occur
new oceanic lithosphere forms
new volcanoes form
new continents are formed
13
What are some evidence of continental drift included what?
planets
water
dirt
ancient Fossils

SCIENCE CHAPTER 7 SECTION 2 Flashcards | StudBud