Semester one review

What layer is a semisolid and acts like a plastic?

• Lithosphere
• Mantle
• Asthenosphere
• crust

What are the two types of crust?

• continental and oceanic
• ocean and basin
• lower and upper
• thick and thin

What drives tectonic plate movement? 

• gravity
• coriolis effect
• convection currents
• the earth's magnetic core

Transform boundaries are most likely to produce what phenomenon?

• volcanoes
• deep sea trenches
• underwater mountain ranges
• earthquakes

When an oceanic plate and a continental plate collide, which one will subduct? 

• oceanic
• continental
• neither
• both

Most geologists rejected Alfred Wegener's idea of continental drift because...

• it did not agree with their current theory
• Wegener was interested in what Earth was like millions of years ago
• Wegener used several different types of evidence to support his hypothesis
• Wegener could not identify the force that moved the continents

In Seafloor Spreading, molten material rises from the mantle and erupts or flows out 

• along the edges of all the continents
• along mid-ocean ridges
• in the deep ocean trenches
• in the north and south poles

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

• subduction
• plate tectonics
• evolution
• seafloor spreading

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

• transform boundary
• divergent boundary
• convergent boundary
• rift valley

A rift valley forms at a 

• convergent plate boundary
• divergent plate boundary
• transform boundary
• deep ocean trench