Unit 2.2 Test Review

In sea-floor spreading, molten material rises from the mantle and erupts

• along the edges of all the continents.

• in deep-ocean trenches.

• along mid-ocean ridges.

• at the north and south poles.

What is the first type of wave felt in an earthquake?

• L wave

• S wave

• Surface Wave

• P wave

The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is known as ___________________.

• convention

• continental drift

• subduction

• conduction

P-waves are also known as _______________________ that compress and expand particles in the direction the wave travels.

• plastic waves

• push-pull waves

• premature waves

• prismatic waves.

These seismic waves are faster but weaker.

• electromagnetic waves

• s-waves

• p-waves

• surface waves

Most geologists think that the movement of Earth's plates are caused by ________________________

• convection

• continental drift

• subduction

• combustion

The geological theory of __________________ states that pieces of Earth's lithosphere are in constant, slow motion.

• subduction

• plate tectonics

• deep-ocean trenches

• sea-floor spreading

A place where two plates slip past each other, moving in opposite directions, is known as a _____________________

• rift valley

• convergent boundary

• divergent boundary

• transform boundary

Scientist think that convection currents flow in Earth's ______________.

• continents

• lithosphere

• mantle

• inner core

The place where two plates come together is known as a ___________________

• transform boudary

• convergent boundary

• divergent boundary

• rift valley