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Online Quizzing
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1

The largest region of Earth in terms of volume is the:
A)crust
B)mantle
C)outer core
D)inner core
E)lithosphere
2

The first person to suggest that southern continents were once joined in a single landmass was:
A)Francis Bacon
B)Alfred Wegener
C)Frank Taylor
D)Edward Suess
E)Harold Jeffreys
3

About 250 million years ago there was a single landmass we call:
A)Laurasia
B)Panthalassa
C)Pangaea
D)Gondwanaland
E)Tethys
4

North America was formerly a part of:
A)Laurasia
B)Gondwanaland
C)Pangaea
D)a and c
E)b and c
5

Among the evidence Wegener used to support his ideas was:
A)similar old mountain ranges on different continents
B)similar fossils older than 150 million years on different continents
C)the fit of continental coastlines
D)all of the above
E)b and c
6

Possible plate driving mechanisms include:
A)convection cells
B)tidal forces
C)rotational forces
D)gravitational forces acting at trenches and ridges
E)a and d
7

Spreading rates for plates are on the order of:
A)1 - 20 cm/yr
B)1 - 10 mm/yr
C)1 - 10 km/yr
D)20 - 30 cm/yr
E)40 - 50 mm/yr
8

Fast spreading centers generally have:
A)no deep central rift valley
B)more gently sloping flanks
C)more seismicity
D)all of the above
E)a and b
9

The life span of a hot spot is thought to be about __________ years.
A)20 million
B)200 million
C)1 billion
D)1 million
E)100,000
10

A good example of a hot spot is:
A)Hawaii
B)Iceland
C)Yellowstone
D)Tahiti
E)all of the above





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