Restless Continents Answers

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1
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If similar fossil collections are found on two continents, now widely separated, what is a possible explanation?

Answer:

One possible explanation is that at the time that the fossilized species lived, the two continents were part of a single landmass.

2
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Please select the word from the list that best fits the definition

A
sea-floor spreading
B
continental drift
C
magnetic reversal
D
magnetic minerals
E
fossils
3

Where does sea-floor spreading take place?

A
convergent boundaries
B
transform boundaries
C
oceanic volcanoes
D
mid-ocean ridges
4

Please select the word from the list that best fits the definition

A
magma
B
seismograph
C
global positioning system
D
fossils
E
rift zones
F
magnetic reversal
5

New oceanic lithosphere forms as a result of

A
sea-floor spreading.
B
normal polarity.
C
reverse polarity.
D
continental drift.
6

When did Pangaea begin to break apart?

A
20 million years ago
B
100 million years ago
C
250 million years ago
D
2 billion years ago.
7

Magnetic reversals have helped to support

A
the theory of Pangaea.
B
the age of the Earth.
C
sea-floor spreading.
D
the theory of Gondwana.
8

Please select the word from the list that best fits the definition

A
magma
B
seismograph
C
global positioning system
D
fossils
E
rift zones
F
magnetic reversal
9

What is it called when Earth’s magnetic poles change places?

A
a strike-slip fault
B
magnetic reversal
C
sea-floor spreading
D
continental drift
10

Please select the word from the list that best fits the definition

A
sea-floor spreading
B
continental drift
C
magnetic reversal
D
magnetic minerals
E
fossils
11

Evidence for sea-floor spreading has come from

A
changes in the depth of the ocean.
B
magnetic minerals on the ocean floor.
C
ancient climatic conditions.
D
the breakup of Pangaea.

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