Continental Drift and Plate Tectonics Flashcard

Front

Wegener’s continental drift hypothesis stated that all the continents once joined together to form

Back

one major supercontinent.

Front

The hypothesis of continental drift is used to explain an event that happened

Back

two hundred million years ago.

Front

What evidence supports Wegener’s hypothesis?

Back

Fossils of the same organism have been found on different continents.

Front

Evidence about ancient climates indicates that

Back

the countries found in the Northern Hemisphere today were once centered over the South Pole.

Front

What results when divergence occurs within the oceanic lithosphere?

Back

seafloor spreading

Front

What forms when one oceanic plate is forced beneath another plate?

Back

a subduction zone

Front

What does NOT occur at a subduction zone?

Back

One oceanic plate moves into another oceanic plate.

Front

Which of the following is NOT evidence of sea-floor spreading?

• the alternation of polarity in segments of the ocean floor
• the relationship between earthquakes and plate boundaries
• analysis of seafloor sediments
• the distribution of ice sheets across the planet

Back

the distribution of ice sheets across the planet

Front

What is true of a rock with paleomagnetism?

Back

Rocks formed millions of years ago show the location of the magnetic poles at the time of their formation.

Front

According to the theory of plate tectonics, the

Back

lithosphere is divided into plates.