Assignment 2

The sea-floor spreading rates are estimated to be: a)0.1 to 1 centimeter/year b)100 to 1000 centimeter/year c)1 to 24 centimeter/year d)10 to 100 meter/year

1 to 24 Centimeter/Year

If a plate moves 20 mm per year, how far will it move in 1 million years? a)2,000 kilometers b)20 centimeters c)20 kilometers d)20 meters

2,000 Kilometers

The East African Rift is an example of: a)a divergent plate boundary. b)an ocean-ocean convergent boundary. c)an ocean-continent convergent boundary. d)a continent-continent convergent boundary.

A Divergent Plate Boundary

The Hawaiian Islands are the result of: a)ocean-ocean convergent plate motion. b)a mantle plume c)subduction d)divergent plate motion

A Mantle Plume

Which of the following features would you expect to find at an ocean-continent convergent boundary? a)earthquakes b)deep ocean trench c)volcanic mountain chain d)all of these

All of these

Which of the following provides evidence of plate motion? a)offset of rocks along the San Andreas fault b)the age distribution of basalt at mid-ocean ridges c)the age distribution of the Hawaiian Islands d)all of these

All of these

Passive continental margins are created by: a)transform motion. b)divergence c)convergence d)all of these

Divergence

Alfred Wegener named the most recent southern supercontinent: a)Gondwanaland. b)Glossopteris c)Laurentia d)Pangaea

Gondwanaland

The principle of contents being in a buoyant equilibrium is called: a)subsidence b)isostasy c)convection d)rebound

Isostasy

135 million years ago when the super-content was breaking apart, the northern super-continent was called: a)Pangaea b)Gondwana c)Glossopteris d)Laurasia

Laurasia

The tectonic plates are part of Earth's: a)asthenosphere b)lithosphere. c)mantle. d)crust

Lithosphere

Which of the following was not used by Wegener as evidence of continental drift? a)magnetic anomalies on the seafloor b)the geometric fit of the contents c)evidence of glaciation on widely separated contents d)fossils that were common to many contents

Magnetic Anomalies on the Seafloor

Which of the following features would you expect to find at an ocean-ocean convergent boundary? a)a transform fault. b)a rift c)shield volcanoes (like Hawaii) d)none of these

None of these

The Vine-Matthews hypothesis explains the origin of: a)plate tectonics b)continental drift c)seafloor magnetic anomalies d)polar wandering

Seafloor Magnetic Anomalies

The sliding of seafloor beneath a continent or island arc is known as: a)seafloor spreading b)obduction c)subduction d)convection

Subduction

Which of the following would you expect to find at a conteinnt-continent convergent boundary? a)deep ocean trench b)volcanic mountain chain c)suture zone d)all of these

Suture Zone

The S-Wave shadow zone is evidence that: a)the core is made of iron and nickel b)the inner core is solid c)the outer core is liquid d)the mantle behaves as ductile material

The Outer Core is Liquid

The San Andreas Fault is the best example of a: a)convergent plate boundary. b)divergent plate boundary. c)transform plate boundary d)none of the above

Transform Plate Boundary