the theory of continental drift describes how the continents have moved throughout earth's history. which of the following is not evidence that supports this theory?
Continental drift is a theory that suggests that the continents have moved and shifted over time due to plate tectonics. Evidence supporting this theory includes the following:
1. Fossil Distribution: Similar fossils have been discovered on different continents that were once part of the same landmass. For example, the Mesosaurus— an extinct freshwater reptile— was found in both South America and Africa, suggesting that these continents were once connected.
2. Rock Formations: The alignment of rock formations (such as mountain ranges) on different continents can be used to reassemble ancient landmasses. The Appalachian Mountains in North America align with the Caledonian Mountains in Europe, indicating that these continents were previously attached.
3. Climate Evidence: Ancient climatic indicators, such as glacial deposits and coal deposits, have been found in regions that currently have tropical or subtropical climates. This suggests that these areas were once located closer to the poles when the continents were in different positions.
4. Paleomagnetism: Magnetic strips on the seafloor show a symmetrical pattern of reversed and normal polarity, indicating that the Earth's magnetic field has shifted over time. This supports the idea that the continents have moved.
Therefore, the statement "All continents were once a single supercontinent called Pangaea" does not match the described evidence. Instead, it supports the theory of Pangaea, which is closely related to continental drift.