Plate Tectonics

What is the order of the layers of the earth starting with the surface?

• crust, mantle, outer core, inner core
• crust, mantle, inner core, outer core
• inner core, outer core, crust, mantle

Heat transfer within a fluid takes place by 

• conduction
• convection
• radiation

When a heat source is removed from a fluid, convection currents in fluid will

• speed up
• change direction
• eventually stop

According to Wegner's hypothesis of continental drift, 

• the continents do not move
• there are seven continents
• the continents were once joined together in a single landmass

Which type of evidence was NOT used by Alfred Wegner to support his continental drift  hypothesis

• shape of continents
• human remains
• fossils
• climate

Most geologists rejected Alfred Wegners' idea because

• He used different types of evidence
• It made no sense since it happens so slowly
• there was no evidence to back it up
• he could not identify a force that moved the continents

In seafloor spreading, molten material rises from the mantle and erupts

• along a deep ocean trench
• at edge of all continents
• along the midocean ridges

The process where the ocean floor sinks beneath a deep ocean trench and back into the mantle is called

• subduction
• convergent
• divergent
• conduction

Old oceanic crust is more dense than new oceanic crust because

• it is hot and been away from the mantle a longer time
• is cool and been away from the mantle for a longer time
• is made of basalt

Most geologists think that the movement of the plates is caused by

• conduction currents in the core
• convection currents in the core
• convection currents in the mantle