Plate Tectonics Review

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

• transform boundary

• convergent boundary

• divergent boundary

• rift valley

Any trace of an ancient organism that has been preserved in rock is called a

• landform

• fossil

• continent

• landmass

Old oceanic crust is more dense than new oceanic crust because it is

• hot

• moving toward a deep-ocean trench

• cool

• closer to the mid-ocean ridge

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

• subduction

• deep-ocean trenches

• plate tectonics

• sea-floor spreading

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

• conduction

• earthquakes

• convection currents in the mantle

• Earth's magnetic field

What technology did scientists use in the mid- 1900's to map the mid-ocean ridge?

• satellites

• submarines

• deep-sea diving

• sonar

A collision between two pieces of continental crust at a converging boundary produces a

• mid-ocean ridge

• rift valley

• deep-ocean trench

• mountain range

According to Wegener's hypothesis of continental drift,

• Earth's surface is made up of 7 major landmasses

• the continents do not move

• Earth is slowly cooling and shrinking

• the continents were once joined together in a single landmass

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

• along the edges of all the continents

• along mid-ocean ridges

• in deep-ocean trenches

• at the north and south poles

What is Pangaea

• the name of a German scientist

• the name of the supercontinent that existed millions of years ago

• another name for continental drift

• the name of an ancient fossil