plate tectonics

What is Wegener’s theory that the continents were once joined together in a single landmass and have since drifted apart?

• plate tectonics

• continental drift

• pangaea

• sea-floor spreading

What is the name of the supercontinent that existed millions of years ago?

• Eurasia

• Pangaea

• Africa

• landmass

What is any trace of of an ancient organism that has been preserved in rock?

• dinosaur

• mountain

• rock

• fossil

What is the crust and the top part of the mantle that is broken into sections called?

• asthenosphere

• mantle

• lithosphere

• plates

Where do plates float on top of the asthenosphere?

• crust

• lithosphere

• mantle

• inner core

What is the geological theory that states that pieces of Earth’s lithosphere are in constant, slow motion?

• continental drift

• convenction current

• tectonic plates

• pangaea

Which is NOT an example of the evidence Alfred Wegener provided to support his theory of continental drift?

• landforms

• fossil

• climate

• magnetic stripe

How did scientists first map the ocean floor?

• sonar technology

• drawing a map

• exploring the ocean

• scientific theories

Where does the molten material rise from in sea-floor spreading?

• from the mantle

• from the crust

• from the lithosphere

• from the ocean

What process continually adds new crust to the ocean floor on both sides of the mid-ocean ridge?

• subduction

• plate tectonics

• sea-floor spreading

• continental drift