Lesson 1: Chapter 9 Plate Tectonics

Multiple Select

Which clues provided evidence for Wegener's theory of continental drift?

• Climate clues

• Fossil clues

• Rock clues

• Satellite imagery

Multiple Choice

Which of the following pieces of evidence did Wegener use to support his hypothesis of continental drift?

• The discovery of mid-ocean ridges

• The fit of continents like puzzle pieces

• The invention of echo sounders

• The presence of satellites in orbit

Fill in the Blank

Wegener could not explain how the continents moved in his theory because he had no _______.