Plate Tectonics Mid-Unit

Which of the following was NOT a piece of evidence supporting Wegener's theory of Continental Drift?

• fossil evidence

• rocks & mountain ranges (landforms)

• the age of rock along mid-ocean ridges

• continent's shapes

What was missing from Wegener's evidence supporting Continental Drift?

• a direction the continents were moving

• a good variety of evidence

• how the continents moved

• an interest from the scientific community

What crucial part of the Theory of Plate Tectonics describes the process by which new ocean floor is created at mid-ocean ridges?

• convection currents

• subduction

• seafloor spreading

• divergence

What process causes the movement of plates?

• reversal of magnetic poles

• earthquakes & volcanoes

• ocean currents

• convection currents

What does subduction, or one plate moving under another, create?

• trenches

• mountains

• divergent boundaries

• fault lines

What parts of the Earth make up the lithosphere?

Group of answer choices

• inner and outer core

• crust and upper mantle

• asthenosphere and mesosphere

• crust only

Tectonic plates are pieces of the

• asthenosphere

• mantle

• lithosphere

• crust

Wegner thought all of the land masses were once connected together in one large mass called

• Gondwanaland

• North America

• Laurasia

• Pangaea

Plate tectonics help to explain

• land erosion

• earthquakes and volcanoes

• ocean currents

• weather systems

What force drives plate movement?

• convection currents

• radiation from the sun

• movement of ice sheets

• cold air currents on the earth's surface