Chapter 14

Question 1

The original continental mass containing all of the present continents prior to separation millions of years ago has been named ________.

A. Gondwanaland

B. Subduction

C. Laurasia

D. Pangaea

E. Ethiopia

Answer 1

D. Pangaea

Question 2

The patterns of magnetic reversals recorded in the ocean floor have helped to establish the age of the oceanic crust. The youngest ocean floor is found

A. at mid-ocean ridges.

B. away from mid-ocean ridges.

C. near the beach.

D. near large islands.

R. away from plate boundaries.

Answer 2

A. at mid-ocean ridges.

Question 3

When plates collide along a convergent boundary, the dense oceanic plate melts as it is pushed down intothe hot mantle in a process called _____________.

A. solifluction

B. transfaction

C. machination

D. subduction

E. liquefaction

Answer 3

D. subduction

Question 4

When crustal rocks are subjected to lateral compressional forces, they are slowly deformed by being bent in a process termed ____________.

A. subduction

B. convection

C. warping

D. faulting

E. folding

Answer 4

E. folding

Question 5

The most massive and amorphous form of igneous intrusion is a ____________.

A. sill

B. lopolith

C. batholith

D. laccolith

E. dike

Answer 5

C. batholith

Question 6

Lahars are

A. bombs associated with a volcanic eruption.

B. an igneous intrusion.

C. a type of magma.

D. mud flows associated with volcanic eruptions.

E. pyroclastic flows.

Answer 6

D. mud flows associated with volcanic eruptions.

Question 7

The primary difference between lava and magma is

A. temperature.

B. chemical composition.

C. flow speed.

D. pressure.

E. location

Answer 7

E. location

Question 8

What is the cause of the “Ring of Fire”?

A. Oceanic turbulence

B. Convergent boundaries

C. Accreted terranes

D. Calderas

E. Sills

Answer 8

B. Convergent boundaries

Question 9

A fault that results from compression forcing an upthrown block over a downthrown block at a low angle is called a

A. normal fault.

B. reverse fault.

C. thrust fault.

D. strike-slip fault.

E. convergent fault.

Answer 9

C. thrust fault.

Question 10

Volcanoes that form in regions where there is no known plate convergence or divergence form from

A. accreted terranes.

B. plate tectonics.

C. mantle plumes.

D. pyroclastic flows.

E. fault-block mountains

Answer 10

C. mantle plumes.