Lab Lesson 2 Essay

942 Words Mar 25th, 2014 4 Pages
Part 1 of 1 - 100.0/ 100.0 Points

Question 1 of 22
4.0/ 4.0 Points
Who proposed that all of the present continents were once joined together in a single supercontinent called Pangaea? A.Alfred Wegener B.Charles Darwin C.Arthur Holmes

D. Harry Hess

Answer Key: A
Question 2 of 22
4.0/ 4.0 Points
The scientific community rejected the theory of plate tectonics because Alfred Wegener could NOT A.identify a mechanism to move the continents. B.disprove competing theories that were not accepted by scientists. C.find geologic similarities on the different continents. D.provide evidence that the continents were once joined together.

Answer Key: A
Question 3 of 22
5.0/ 5.0 Points
In the 1950s, Harry Hess
…show more content…
A.1 to 5 centimeters per year B.6 to 10 centimeters per year C.11 to 15 centimeters per year D.16 to 20 centimeters per year

Answer Key: A
Question 15 of 22
4.0/ 4.0 Points
If new crust is indeed being produced at the rifts, where does the additional older crust go? A.It is lost through subduction. B. It becomes oceanic crust. C.It becomes continental crust. D. It is lost through seafloor spreading.

Answer Key: A
Question 16 of 22
4.0/ 4.0 Points
Most of Earth’s volcanoes are located in the _______________ around the Pacific Rim just beyond the oceanic trenches, where magma, which is less dense than the surrounding rock, rises to the surface and erupts. A.Ring of Ice B.Ring of Water C.Ring of Fire D.Ring of Soil

Answer Key: C
Question 17 of 22
4.0/ 4.0 Points
Stretching forces generated in the lithosphere immediately above the rising portion of a convection cell result in rifting of the lithosphere and ultimate formation of what type of plate boundary?

A.convergent B. transform C.divergent D.hot spot

Answer Key: C
Question 18 of 22
4.0/ 4.0 Points
Pushing forces generated in the lithosphere above the adjacent downgoing portion of the convection cell result in the formation of a deep-sea trench that eventually develops into what type of plate

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