Question

which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?
he proposed that plates carry parts of the seafloor.
he theorized that pieces of earth move for a limited time.
he suggested that the asthenosphere is broken into segments.
he observed seafloor cracks similar to existing cracks in the continents.

Explanation:

To solve this, we analyze each option:

• Option 1: John Tuzo Wilson proposed that plates carry parts of the seafloor (related to his work on transform faults and plate movement with seafloor components).
• Option 2: Plate tectonics states plates move continuously, so "limited time" is incorrect.
• Option 3: The lithosphere (not asthenosphere) is broken into plates, so this is wrong.
• Option 4: His work wasn't about observing seafloor cracks similar to continental cracks in this context.

Answer:

A. He proposed that plates carry parts of the seafloor.