Tectonic Plate Theory

How does fossil evidence support Wegener's hypothesis of continental drift?

• Similar fossils are found along continental margins that appear to join together.

• Fossils are found in areas where the present-day climate could not have supported the organisms that made the fossils.

• Similar fossils of giant, land-dwelling dinosaurs are found on continents separated by oceans.

• All of the answers here are correct

What would you be most likely to find at a convergent boundary between two pieces of continental crust?

• A number of large volcanoes

• A rift valley

• An island arc

• A mountain range

Plates slide past one another horizontally at _______ boundaries.

• transform

• divergent

• convergent

• subductive

This graphic depicts

• An oceanic plate meeting a continental plate resulting in subduction and volcanism.

• Two continental plates meeting which results in mountain formation.

• A rift forming between a continental and oceanic plate.

• A transform boundary that experiences many earthquakes due to strike-slip faulting.

The crust and the uppermost mantle make up the _________.

• lithosphere

• asthenosphere

• magmetic accretion zone

• tectonic zone

The Mid-Ocean Ridge is a divergent fault on the floor of the Atlantic Ocean that helps explain continental drift. Which best describes where the oldest rock is on the floor of the Atlantic Ocean?

• At the very center of the Mid-Atlantic Ridge

• At the far edge of the ocean plate where it meets the continents

• Near northern end of the ridge around Iceland

• Near thr southern end beyond the tip of Africa

What type of evidence was NOT used by Alfred Wegener to support his continental drift hypothesis?

• evidence from ancient climates and plants

• evidence from landforms

• evidence from fossils

• evidence from human ancestry and DNA lineage

The Andes have been formed as a result of the __________ of the Nazca plate and the South American plate.

• convergence

• divergence

• transformation

• convection

This movement of hot material toward the surface while cooler material sinks is thought to be

• the driving process behind the movement of tectonic plates

• the reason why there are some many volcanoes in the center of continents

• the opposite of the way convection works

• the real cause for the extinction of the dinosaurs

Most plates move a few ____ per year.

• meters

• centimeters

• millimeters

• kilometers