Plate tectonics , volcanoes, and earthquakes

Why did scientists not accept Wegener's hypothesis about Continental Drift?

• he could not explain why the oceanic crust is thinner than the continental crust

• he could not describe the climate of Pangea

• he could not describe how seeds could move from Africa to South America

• Wegener could not explain what processes could move a continent

Tags

NGSS.HS-ESS1-5

What evidence supported Wegener's Continental Drift hypothesis?

• the fit of the continents

• similar rocks on different continents

• the fossil record

• all the above

Tags

NGSS.HS-ESS1-5

Who used sonar while in the Navy to map the ocean floor? This person discovered mountain ranges and trenches that finally provided proof of continental drift.

• Harry Hess

• Alfred Wegener

• Marie Tharpe

• Albert Einstein

Tags

NGSS.HS-ESS1-5

Most of the world's folded (non-volcanic) mountains formed as a result of

• oceanic-oceanic separation at mid-ocean ridges

• continental-continental separation at rift zones.

• continental-oceanic collision at subduction zones

• continental-continental collision at convergent boundaries

Tags

NGSS.MS-ESS2-3

When an oceanic plate collides with a continental plate, the oceanic plate is usually subducted because

• continental plates move faster than oceanic plates

• oceanic crust is denser and thinner than continental crust

• oceanic crust is denser and thicker than continental crust

• continental crust is denser and thinner than oceanic crust

Tags

NGSS.MS-ESS2-3

How do mid-ocean ridges help to prove continental drift and the theory of plate tectonics?

• Oceanic crust is destroyed at mid-ocean ridges

• new crust forms at mid-ocean ridges

• tectonic plates collide at mid-ocean ridges

• the crust at mid-ocean ridges is very old

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

Who analyzed sonar data, mapped the ocean floor, and discovered the mid-Atlantic ridge

• Inge Lehmann

• Harry Hess

• Alfred Wegener

• Marie Tharpe

How is a shield volcano created?

• Repeated eruptions of low viscosity lava that spread over a wide area

• from repeated explosive eruptions

• From alternating layers of lava and pyroclastic material

• from a cinder cone through repeated eruptions of high viscosity lava

Earthquakes occur at the _______, while the point on the surface directly above is called the ____.

Which rating scale would be used to tell how much damage was done to people, homes, and buildings

• Enhanced Fujita

• Mercalli

• Ritcher

• Moment magnitude