Plate Tectonics

Which evidence did Wegener make use of to develop the theory of continental drift?

• Similar fossils were found on different continents.

• The climate of Siberia has always been the same.

• The Rocky Mountains are taller than the Appalachian Mountains.

• There is no evidence of glaciers anywhere in South America.

Which word best describes the hot, weak, inner part of the upper mantle, which can flow?

• crust

• core

• lithosphere

• asthenosphere

Which two parts of the Earth make up the lithosphere?

• inner core and outer core

• crust and outer part of the mantle

• inner core and mantle

• mantle and outer core

Alfred Wegener's theory about Earth's past included a supercontinent made up of all the continents put together.

Which word named the supercontinent?

• Gondwanaland

• Pangaea

• Laurasia

• Americas

Which term is described as a flat expanse of ocean floor?

• continental shelf

• deep-sea trenches

• abyssal plains

• guyots

Which phrase gives two forces scientists believe are responsible for tectonic plate motion?

• gravity acting on the edges of plates and friction between the plate and the asthenosphere

• convection in the mantle and pressure of magma on the edge of the plate

• friction between the plate and the asthenosphere and pressure of magma on the edge of the plate

• gravity acting on the edges of plates and convection in the mantle

What activates a convection current, starting the flow of a fluid?

• temperature differences in the mantle

• heated liquids at Earth’s surface

• cold temperatures at the north pole

• iron-rich rocks in the mantle

At which type of boundary do lithospheric plates collide?

• gravitational boundaries

• convergent boundaries

• contour boundaries

• convection boundaries

According to the theory of plate tectonics, how do two plates interact to form Earth's largest mountain ranges?

• create new plates

• scrape past each other

• collide

• move apart

Which evidence did Wegener make use of to develop the theory of continental drift?

• The climate of Siberia has always been the same.

• The Rocky Mountains are taller than the Appalachian Mountains.

• There is no evidence of glaciers anywhere in South America

• Mountains in North America appear to be part of the same chain of mountains as those in Northern Europe.