Fill in the Blanks Fill in the Blanks: Drifting ContinentsOnline version Test your knowledge on the theory of drifting continents and plate tectonics! by Lcda. Alondra Garcia 1 1910 continents supercontinent landmass idea climate fossil Pangea surface explanation fossils German evidence Wegener landmass drifted drift Alfred 300 geologists pulls continental Wegener's mountain In , a scientist named became curious about why some look as though they could fit together . hypothesis was that all the continents were once joined together in a single and have since apart . Wegener's idea that the continents slowly moved over Earth's became known as . According to Wegener , the continents were joined together in a or single , about million years ago . Wegener called the supercontinent . Land features on the continents such as ranges and coal fields provided Wegener with for his hypothesis . He also used to support his hypothesis for continental drift . A is any trace of an ancient organism that has been preserved in rock . Wegener also used evidence of change to support his hypothesis . Wegener could not provide a satisfactory for the force that pushes or the continents . Because he could not identify the cause of continental drift , most of his time rejected his .
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