Question

evidence related to which of the following earlier ideas led to the modern theory of plate tectonics?

a. seafloor spreading and atomic theory
b. continental drift and seafloor spreading
c. the big bang theory and natural selection
d. biological evolution and the big bang theory

Explanation:

Identify the core question

The question asks which earlier scientific ideas provided the evidence and conceptual foundation that led directly to the modern theory of plate tectonics.

Analyze the historical development of plate tectonics

The modern theory of plate tectonics was developed by combining several key geological ideas:

• Continental Drift: Proposed by Alfred Wegener in 1912, suggesting that continents move across Earth's surface.
• Seafloor Spreading: Proposed by Harry Hess in the early 1960s, explaining how new oceanic crust forms at mid-ocean ridges and spreads outward.

Evaluate the given options

• A. seafloor spreading and atomic theory: Atomic theory is a fundamental concept in chemistry and physics regarding the nature of matter, not a direct precursor to plate tectonics.
• B. continental drift and seafloor spreading: Both of these geological concepts directly merged to form the comprehensive theory of plate tectonics.
• C. the big bang theory and natural selection: These are cosmological and biological theories, respectively, unrelated to the movement of Earth's lithospheric plates.
• D. biological evolution and the big bang theory: These are unrelated to the physical mechanisms of plate tectonics.

Connect to mastered concepts

Using the Tectonic Plate Interactions knowledge point, we understand how the movement of lithospheric plates shapes Earth's surface features. The historical foundation of this movement relies on the combination of continental drift and seafloor spreading.

Answer:

• (A) seafloor spreading and atomic theory
• (B) continental drift and seafloor spreading (Correct answer)
• (C) the big bang theory and natural selection
• (D) biological evolution and the big bang theory