8th science ch. 4 lesson 2 plate tectonics

What was the name given to the supercontinent before it broke up?

• Pangea

• Eutopia

• Cretaceous

• Jura

What theory explains how the supercontinent, Pangea, broke apart?

• plate tectonics

• continental divide

• seismic waves

• vibration

The plate tectonics theory helps us understand how Pangea broke apart, and ......

• the many changes in the Earth's interior

• if the continents will divide again

• how long it took for Pangea to break apart

• if the continents will fuse together again

heat transfer involving the movement of fluids-including liquids and gasses

• convection

• conduction

• convergent

• subduction

convection is caused by differences in _________ and __________.

• volume

• temperature

• density

• speed

the result of the transfer of heat from the interior of the Earth

• convection currents

• energy currents

• seismic waves

• heat waves

During convection, what causes the earth's plates to move?

• motion in the mantle

• a change in the temperature of the earth's interior

• a change in the density of the mantle

• collisions of rocks on the earth's surface

The _________ is composed of oceanic plates and continental plates.

• lithosphere

• athenosphere

• mesosphere

• core

Oceanic plates: ​ (a)  

Continental plates: ​ (b)  

• more dense but thinner
• less dense but thicker

the regions where plates meet and they are active with different types of

geological occurrences

• plate boundaries

• plate vertexes

• plate connections

• plate regions