Please fill out and return this sheet after viewing Program #3. If you are unsure of an answer, give your best intelligent guess.

1.   Who proposed continental drift?

2.  What name did Wegner give to the supercontinent that included most of the present-day continents?

3.  What objections did scientists raise to Wegener's ideas?

4.  What information did Wegener lack in having a more complete understanding of continental drift?

5.  What technology developed out of WWII that helped map the ocean floor?

6.  What mechanism causes plates to move in plate tectonics?

7.  What concept did Harry Hess and Robert Dietz propose in 1960?

8.  How did magnetic signatures help to prove sea floor spreading?

9.  Where would oldest sediments be found relative to a mid-ocean ridges?

10.  What lines evidence did Wegener introduce to indicate that continents were connected and have migrated?