Chapter 3 Test - Plate Tectonics

According to Wegener's hypothesis of continental drift, ___

• Earth is slowly cooling and shrinking

• the continents were once joined together in a single landmass

What is Pangaea?

• the name of the supercontinent that existed millions of years ago

• the name of a German scientist

Any trace of an ancient organism that has been preserved in rock is called ___

• continent

• fossil

What technology did scientists use in the mid-1900s to map the mid-ocean ridge?

• sonar

• cameras

In sea-floor spreading, molten material rises from the mantel and erupts ___

• along mid-ocean ridges

• at the north and south poles

Old oceanic crust is more dense than new oceanic crust because it is ___

• wiser

• cool

Most geologists think that the movement of Earth's plates is caused by ___

• whales

• convection currents in the mantle

The geological theory that states that pieces of Earth's lithosphere are in constant, slow motion is the theory of __

• plate tectonics

• spinning plates

A place where two plates slip past each other, moving in opposite directions is known as a ___

• walking boundary

• transform boundary

A collision between two pieces of continental crust at a converging boundary produces a

• mountain range

• earthquake