Question 1 1. Why was Wegner’s continental drift theory not initially recognized

Question

Question 1

1. Why was Wegner’s continental drift theory not initially recognized?

A. He incorrectly identified fossils.

B. He had no mechanism for the movement of continents.

C. He was not good at expressing his hypothesis.

D. He incorrectly identified river deposits as glacial deposits

Question 2

What happens at a spreading center?

A. Deep-sea trenches are formed.

B. New oceanic crust is formed.

C. Two plates collide.

D. The crusts are recycled into Earth’s interior.

Question 3

When does subduction occur?

a.When one plate slides beneath another

b.When a plate is recycled into Earth’s interior

c.When a plate enters the mantle at a deep-sea trench

d.When seafloor is recycled beneath an overriding plate

All of the above

Question 4

What is the rock cycle?

A.

A concept describing how rocks are moved in running water.

B.

A concept describing the fact that rocks roll downhill.

C.

A concept proposing that rocks are naturally recycled.

D.

A concept predicting that rocks eventually return to their place of origin.

E.

None of the above.

Explanation / Answer

1) B. He had no mechanism for the movement of continents.

Alfred Wegener   proposed continental drift theory , he did not give the mechanism or the driving forces for the movement of continents , but later the mechanism was given by Arthur Holmes.

2) B. New oceanic crust is formed.

Seafloor spreading creates new oceanic crust where as Subduction destroys the already existing crust.

3) All of the above

Subduction occurs when one plate slides beneath another or When a plate is recycled into Earth’s interior or

When a plate enters the mantle at a deep-sea trench or When seafloor is recycled beneath an overriding plate

4)  C. A concept proposing that rocks are naturally recycled.

Rock cycle is  a natural cycle of rocks consisting of the processes of

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.