Continental Drift and Plate Tectonics

How do moving plates affect Earth's surface?

• They cause earthquakes and volcanic activity.

• They have no effect on Earth's surface.

• They only affect the weather.

• They make the Earth flat.

Identify the 3 main types of plate boundaries.

• Convergent, Divergent, Transform

• Convergent, Divergent, Subduction

• Transform, Subduction, Collision

• Collision, Divergent, Transform

What did Wegener's continental drift hypothesis state about the continents?

• The continents are fixed and do not move.

• The continents were once joined together and have drifted apart over time.

• The continents are constantly moving towards the equator.

• The continents have always been in their current positions.

What evidence supported Wegener's theory of continental drift?

• Fossil correlations across continents

• Similar rock formations on different continents

• The fit of the continents

• All of the answers are correct

What evidence did Wegener use to support his theory?

• Fossil evidence

• Rock evidence

• Climate evidence

• Biological evidence

Ancient climates were also used to support his theory of continental drift. Wegener found evidence of ancient glaciers with an arctic climate that are now tropical or subtropical. What does this evidence support?

• The theory of evolution

• The theory of continental drift

• The theory of relativity

• The theory of plate tectonics

What was Wegener unable to provide an explanation for?

• Wegener could not provide an explanation of exactly what made the continents move.

• Wegener could not explain the formation of mountains.

• Wegener could not explain the occurrence of earthquakes.

• Wegener could not explain the existence of oceans

Which of the following describes normal polarity?

• When rocks show the same magnetism as the present magnetism field

• When rocks show the opposite magnetism as the present magnetism field

What is one of the strongest pieces of evidence for seafloor spreading?

• The discovery of strips alternating polarity

• The presence of magma

• The movement of ocean water

• The formation of mountains

What does the data on the ages of seafloor sediment confirm?

• The seafloor spreading hypothesis

• The continental drift theory

• The plate tectonics theory

• The volcanic activity hypothesis