Choose the answer that best fits the blank. Hundreds of years ago, geographers first noticed that many of Earth's continents have shapes that seem to "fit together" like a big puzzle that was broken up. Because of this, they theorized that the continents had slowly changed position over time. The explanation for exactly
Choose the answer that best fits the blank.
Hundreds of years ago, geographers first noticed that many of Earth's continents have shapes that seem to "fit together" like a big puzzle that was broken up. Because of this, they theorized that the continents had slowly changed position over time. The explanation for exactly how this movement occurred, however, did not become clear until geologic research in the 1960s led geologists to formalize the theory of _______ . This scientific theory states that continents move because they are a part of a series of plates that form Earth's crust. These plates shift around the planet, moving on a bed of liquid, hot rock known as magma.
A.plate tectonics
B. continent drift
C. paleomagnetism
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