Science 10

Which force causes hotter, less dense material to force itself up through a ridge?

• Convection current

• Hotspot

• Ridge push

• Slab pull

What do we call areas with abnormally high volcanic activity that have remained stationary for a very long time?

• Fault lines

• Hotspots

• Rift valleys

• Trenches

Which process moves material underneath the plates sideward?

• Convection current

• Mantle plume

• Ridge push

• Subduction

What is the force that causes the pulling of oceanic lithosphere downward at subduction zones?

• Convection current

• Hotspots

• Ridge push

• Slab pull

What do we call the rising of hot rocks from the lower mantle?

• Convection current

• Hotspots

• Ridge push

• Slab pull

Fossil evidence is often used to explain continental drift. Which fossil, characterized by its leaves, helped support the theory of Pangaea’s existence?

• Cynognathus

• Glossopteris

• Mesosaurus

• Lystrosaurus

A small reptile is considered a transitional form linking reptiles and mammals. Which fossil is this?

• Cynognathus

• Glossopteris

• Mesosaurus

• Lystrosaurus

Who discovered Earth’s radioactivity and proposed the idea of convection currents driving plate movement?

• Alfred Wegener

• Arthur Holmes

• Charles Darwin

• Harry Hess

What do we call the phenomenon where the polarities of Earth’s magnetic field have changed over time?

• Geomagnetic reversal

• Magnetic declination

• Paleomagnetism

• Seafloor spreading

At what specific temperature do materials lose their magnetism?

• Boiling point

• Curie point

• Fusion point

• Melting point