Plate Tectonics, Earthquakes, and Volcanoes Test

The German scientist Alfred Wegener proposed a theory that is called _____ that said the continents were once all joined as a single landmass called Pangaea.

• Paleomagnetism
• Continental Drift
• Floating Continents
• Seafloor Spreading

The process in which new crust is formed that verified Alfred Wegener's theory of continental drift is

• geomagnetic reversal
• magnetic symmetry
• subduction
• seafloor spreading

Which evidence does NOT support the theory that Africa and South America were once part of the same large continent?

• correlation of coastlines on opposite sides of the Atlantic Ocean
• correlation of living animals on opposite sides of the Atlantic Ocean
• correlation of rocks on opposite sides of the Atlantic Ocean
• correlation of fossils on opposite sides of the Atlantic Ocean

Wegener's theory of continental drift was rejected because

• he did not have any evidence
• he could not prove what force caused continents to move
• he found fossils of Mesosaurs on mutiple continents
• he had too much evidence

The two types of crust are

• oceanic and volcanic
• oceanic and transform
• volcanic and continental
• continental and oceanic

During the process of seafloor spreading at the mid-ocean ridge

• old crust is destroyed
• crust goes into the trenches
• new crust is formed
• the less dense plate melts into the mantle

During the process of subduction at the trench

• old crust is destroyed
• continental crust goes under oceanic crust
• new crust is formed
• the lighter plate melts into the mantle

Tectonic plates are huge pieces of

• lithosphere/crust
• mantle
• core
• asthenosphere

The process that involves magma being heated from the core, cooling as it rises and then sinking back down is called what?

• radiation
• convection
• conduction
• perspiration

To get a sample of material from the mantle, drilling will be done through the oceanic crust rather than through the continental crust because oceanic crust is

• younger than continental crust
• less dense than continental crust
• thinner than continental crust
• softer than continental crust