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continental drift
This term refers specifically to the scientific hypothesis and subsequent theory regarding the movement of Earth's landmasses. It is primarily used in academic, geological, and educational contexts. While it describes a physical process, it is treated as a singular conceptual entity within the field of plate tectonics.
Because it describes a specific geological phenomenon, it is used as an uncountable noun. You would not refer to multiple instances of "continental drifts" when discussing the general theory; instead, you would discuss the "effects" or "evidence" of continental drift.
Meanings
Examples
Alfred Wegener first proposed the theory of continental drift in the early twentieth century.
Do you think continental drift is the main reason why South America and Africa fit together like puzzle pieces?
Do you think continental drift is the main reason why South America and Africa fit together like puzzle pieces?
The evidence for continental drift was initially dismissed by many geologists of the time.
I wonder how the world would look today if continental drift had stopped millions of years ago.
Continental drift explains how the supercontinent Pangaea eventually broke apart.
Continental drift explains how the supercontinent Pangaea eventually broke apart.
The slow process of continental drift reshapes the surface of our planet over eons.
We are studying the relationship between continental drift and the formation of mountain ranges.
We are studying the relationship between continental drift and the formation of mountain ranges.