Plate Tectonics and Continental Drift

What is Pangaea?

• an ice sheet which covered several continents

• a fossil of a fern found on multiple continents

• a mountain belt linking two continents

• a supercontinent that contained all existing land masses

Tags

NGSS.MS-ESS2-2

What is the theory of continental drift?

• the continents move slowly over Earth's surface

• the continents moved millions of years ago but now are stuck

• the continents were stuck, but recently have begun to move

• the continents don't move

Why were some scientists skeptical of Wegener's idea of continental drift?

• they found evidence of colder climates on continents that are now warm

• they did not understand what caused similar rock formations on different continents

• they did not understand what caused continents to move

• they found fossils of similar organisms on several continents

What happens as the seafloor spreads apart

• the older oceanic crust folds into the mid-ocean ridge

• the newer oceanic crust is pushed under the mid-ocean ridge

• the older oceanic crust moves away from the mid-ocean ridge

• the newer oceanic crust moves toward the mid-ocean ridge

Which plate boundary is connected with the most disastrous earthquakes?

• hot spots

• convergent boundaries

• divergent boundaries

• transform boundaries

Which type of fault is most frequently found at convergent boundaries?

• Normal and Reverse

• Strike-Slip and Normal

• Reverse

• Strike-Slip

Which is an accurate example of a transform plate boundary?

• Himalaya Mountains

• East African Rift

• Hawaiian Islands

• San Andreas Fault

When does a divergent plate boundary form?

• When a denser plate sinks below a more buoyant plate

• When two plates slide past each other

• When two plates separate

• When two plates collide

When two plates move away from each other we call it a(n):

• earthquake

• magnetic reversal

• divergent plate boundary

• convergent plate boundary

What is the process that forms new oceanic crust, then moves it?

• Focus

• Mid-Ocean Ridge

• Seafloor Spreading

• Basal Drag