Plate Tectonics, Earthquakes, and Volcanoes Review

New York and London are on two separate diverging plates so the distance between the cities is ___________.

• stationary

• increasing

• decreasing

• always changing

Oceanic lithosphere subducts under continental crust because ___________________.

• oceanic lithosphere is more dense than the continental crust

• the upwelling magma at convergent boundaries pushes the lithospheric plate into the asthenosphere

• the pressure from two plates colliding forces one plate into the asthenosphere

• the convection of the core pulls the lithosphere into the asthenosphere

Deep ocean trenches are surface evidence for ____________________.

• rifting beneath a continental plate and the beginning of continental drift

• sinking of oceanic lithosphere into the mantle at a subduction zone

• rising of hot asthenosphere from deep in the mantle

• transform faulting between an oceanic plate and a continental plate

Which type of plate boundary is represented by the following picture?

• Hot Spot

• Transform

• Convergent

• Divergent

The figure below shows a _______________ boundary.

• Hot Spot

• Transform

• Convergent

• Divergent

When an earthquake occurs, energy radiates in all directions from its source. The source is also referred to as the ______________.

• inertial point

• Focus

• Epicenter

• Seismic Zone

The position on Earth's surface directly above the earthquake source is called________________.

• inertial point

• Focus

• Epicenter

• Seismic Zone

Which one of the following statements is correct?

• P waves travel through solids, S waves do not

• P and S waves travel through liquids, but P waves do not travel through solids

• P and S waves travel through solids and P waves travel through liquids.

• P and S waves travel through liquids, but S waves do not travel through solids

One measurement that is widely used to determine how far the focus of an earthquake is from the seismograph where it is recorded is____________.

• the amplitude of the P wave

• the amplitude of the S wave

• the difference in travel time between the P and S wave

• the difference in amplitude between the P and S wave

Pyroclastic flows move ______________.

• very rapidly, too fast to outrun on foot

• as gravity flows, similar to snow avalanches

• as a dense cloud that contains hot magma particles suspended in hot gases and moves rapidly downhill

• all of the above