Continental Drift/Sea-Floor Spreading

Which of the following scientists developed the hypothesis of Continental Drift?

• Wegener

• Hess

• Einstein

• Churchill

Originally, the Hypothesis of Continental Drift was not well received by other scientists. Why?

• There was a competing theory at the time which was more believable.

• There was no data showing the continents ever moved.

• The scientists didn't know the force responsible for the moving continents.

• The scientist presenting the data was unreliable.

The three animals, mesosaurus, lystrasaurus, and cynognathus represent what type of evidence that the continents actually moved?

• zoological evidence

• glacial evidence

• evidence of climate change

• fossil evidence

Which of these terms means scratches in rocks caused by glaciers?

• striations

• stripes

• stratosphere

• stretch marks

What is the force that causes continents to move?

• conduction

• convection

• radiation

• conveyor belts

The cycling of materials due to differences in density is called _______________.

• convection

• conduction

• radiation

• molting

Which of the following discoveries is evidence supporting the idea of continental drift?

• the discovery of matching plant and animal fossils found on different continents

• the discovery that most earthquakes are near plate boundaries

• the discovery that rock age increases as distance from mid-ocean ridges increases

• the discovery of sea-floor rock patterns to magnetic reverals

Look at this image. Which explanation best summarizes the hypothesis shown in the figure?

• The present continents will gradually move to form a single landmass called Pangaea.

• The continents were once a large landmass name Pangaea, which broke apart and gradually drifted to the present-day locations of the continents.

• The continents were once a large landmass, but the north and south magnetic poles pulled the continents apart toward the poles

• The continents were once a large landmass, but the ocean levels rose, and these oceans separate today's continents.

In the early 1900s, a hypothesis was introduced that proposed a single large landmass broke into smaller landmasses and formed the continents, which drifted in their present locations. Which is the name of this hypothesis?

• continental drift

• continental shift

• plate movement

• plate tectonics

Look at this image, which shows changes at mid-ocean ridges. The highlighted section shows how one location of the sea floor moves over time. Which process is demonstrated in this image?

• Continental drift

• earthquakes

• plate collisions

• sea-floor spreading