1. What observation about the Atlantic coastline first suggested to scientists that continents might have moved? (Pg. 1) Page 27
2. Name and describe the two large continental masses that initially formed when Pangaea broke apart. (Pg. 1) Page 27
3. Explain how the distribution of the fossil reptile *Mesosaurus* supports the continental drift theory. (Pg. 2) Page 28
4. What major discovery from post-World War II ocean floor mapping revitalized the study of continent distribution? (Pg. 2-3) Page 28-29
5. Describe the distribution pattern of earthquake foci (shallow vs. deep) in relation to mid-ocean ridges and the Pacific Rim. (Pg. 3) Page 29
6. What is the basic concept of “sea floor spreading” as proposed by Harry Hess? (Pg. 4-5) Page 30-31
7. What are the three main types of plate boundaries? Define each briefly. (Pg. 7) Page 33
8. Explain the convection cell model as the driving force for plate tectonics. (Pg. 7-8) Page 33-34

Who first proposed the comprehensive theory of ‘continental drift’? (Pg. 1)

What evidence for continental drift is provided by the matching rock formations of 2,000 million years between Brazil and West Africa? (Pg. 1-2)

What was the key problem with the forces (pole-fleeing and tidal) suggested by Wegener to move the continents? (Pg. 2)

Which of the following is NOT one of the three major divisions of the ocean floor? (Pg. 3)

According to sea floor spreading, where is the youngest oceanic crust found? (Pg. 4)

A tectonic plate is composed of: (Pg. 6)

At which type of boundary is new crust generated? (Pg. 7)

How do scientists determine the rate of plate movement? (Pg. 7)

What major geological formation in India is linked to the outpouring of lava during the northward movement of the Indian plate? (Pg. 8)

(Exercise) Who amongst the following was the first to consider the possibility of Europe, Africa and America having been located side by side? (Pg. 9)

(Exercise) Polar fleeing force relates to: (Pg. 9)

(Exercise) Which one of the following is not a minor plate? (Pg. 9)

(Exercise) Which fact was NOT considered in discussions of sea floor spreading? (Pg. 9)

(Exercise) What is the type of plate boundary of the Indian plate along the Himalayas? (Pg. 9)

Alfred Wegener named the single supercontinent ______. (Pg. 1) Page 27

______ is the sedimentary rock formed from glacier deposits, used as evidence for continental drift. (Pg. 2) Page 28

Arthur Holmes proposed that ______ currents in the mantle could be the driving force for continental movement. (Pg. 2) Page 28

The longest mountain chain on Earth, submerged under ocean waters, is the ______. (Pg. 3) Page 29

A key observation for sea floor spreading was that sediments on the ocean floor are unexpectedly ______. (Pg. 4) Page 30

The Pacific plate is largely an ______ plate. (Pg. 6) Page 32

The location where one plate sinks under another is called a ______ zone. (Pg. 7) Page 33

The movement of the Indian plate caused the uplift of the ______. (Pg. 8) Page 34

(Exercise) What were the two forces suggested by Wegener for continental movement? (Pg. 9) Page 35