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Samples of rock from different locations.
Data
Cell Theory
a scientist exploring evidence from other fields of science to support findings
They obtain empirical evidence by undertaking research. Research includes doing experiments and running surveys.
They relied more on evidence
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NASA recently released a photo of the spreading debris from a collision in the asteroid belt.
the oceanic crust goes down your mouth
its not happy
Not really but sea floor sediments thickness increase with increased distance from spreading centers which is good evidence. Other evidence such as magnetic reversals, temperature, dating methods provide the best evidence of seafloor spreading
From Wikipedia: Starting from August 1968, the Glomar Challenger embarked on a year-long scientific expedition, the Deep Sea Drilling Program, criss-crossing the Mid-Atlantic Ridge between South America and Africa and drilling core samples at specific locations. When the age of the samples was determined by paleontological and isotopic dating studies, this provided conclusive evidence for the seafloor spreading hypothesis, and, consequently, for continental drift.
They technically don't. They do provide evidence for it, however, in that they occur in pairs on either side of a rift, providing strong evidence that the rocks on either side were deposited at the same time and that the rifts are spreading.
evidence from molten material evidence from magnetic stripes evidence from drilling samples
seafloor spreading
Magnetic reversals
magnetic reversal
The evidence helps scientists come up with explanations about the natural world