Plate Tectonics 4B

According to the continental drift theory, a single, huge continent once existed called

• Wegner

• Eurasia

• Pangea

• Pnthalassa

Which is NOT evidence that Wegner used to support his theory of Continental Drift?

• continents fit together like puzzle pieces

• movement is subtle but noticeable

• same fossils and geologic formations are found on different continents

• evidence of coal in polar regions, and remnants of glaciers in tropical regions

What was the discovery in the 1950s that led to Harry Hess understanding Sea Floor Spreading?

• underwater photography

• shipwrecks on the ocean floor

• seismic waves

• sonar

What is the outermost layer of Earth called?

• core

• lithosphere

• asthenosphere

• mesosphere

What is the liquid layer of the Earth's core called?

• lithosphere

• mesosphere

• outer core

• inner core

Tectonic plates consist of

• both continental and oceanic crust

• continental crust

• mesosphere

• oceanic crust

Where in the Earth do convection currents occur?

• in the lithosphere

• along a subduction zone

• along a rift valley

• in the asthenosphere

As rock moves away from a mid-ocean ridge, it is replaced by

• older rock

• continental crust

• microplate terrain

• molten rock

At an oceanic-oceanic convergent boundary,

• old crust is deformed or fractured

• a new crust is created

• old crust is recycled by subduction

• plates slide past one another

The existence of coal beds in Antarctica indicates that the continent was

• closer to the equator

• farther from the equator

• part of Africa

• cold and dry