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In the health field, it took many years and deaths before doctors recognized that they were causing deaths by not washing their hands and changing their clothing as they moved between patients.

Another was the concept that the earth was round and not flat.

The theory that the sun rotated around the earth also took quite some time to prove wrong.

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Q: What theory took a very long time before proven?
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Does a theory have to be true all the time?

Not at all. That it hasn't been proven is what makes it a theory. Once proven, it becomes a law.


When hypothesis has backing of experimental data it is upgraded to?

When the theory withstands the new discoveries and proven correct by new instruments over the long time, it is considered


Does a scientific law become a scientific theory?

A theory, when proven over time, can become a law. Example: Law of Gravity and Theory of Evolution


Is a theory a myth?

No. A theory is a hypothesis that has been proven time and time again, with every piece of evidence poiting to its correctness. A myth is a story, often from long ago, taht attempts to explain a phenomenon in spiritual or, well, mythological ways.


What is a theory called when it is proven to be correct?

A theory is never truly "proven" correct; data can be found time and time again that supports a hypothesis, which may then become a theory, but a theory doesn't really graduate to something else if it "seems" correct. Theories are always being modified as new advancements are made. "Law" (like the law of gravity) is a dated term that essentially equates to a theory in modern science.


A theory that has been proven true repeatedly over time and never disproven is called?

A Law


What is a theory in physics?

A theory is something that has been tested over time and the data constantly supports it. Examples are the theory of relativity or the theory of evolution. This is way different from the conventional usage, which is just something somebody things. I hate it when people use it that way! Note: A theory is never proven. Nothing in science is proven, but a theory is as close as you can get. The data can only support the facts.


Why was Copernicus' heliocentric theory significant?

The Heliocentric theory was significant because Copernicus had proved something such a long time ago... the fact that it hasn't been proven wrong, or the fact that no-one else believed him because they didnt have the technology to prove it back then.


Darwins theory of evolution views at the time of his work and social forces that led to support for the theory?

There is no proven theory of evolution only the physical evidence of what Chuck Norris has allowed to live.


Why do scientists revise theories?

By definition a Theory is nothing more than an unproven idea, and therefore until it becomes proven (and a Fact) is subject to change as more information about the area of study becomes available. Until it can be proven 100% of the time (e.g. Gravity) it will remain a Theory, and no matter how sound will be subject to revision until it can be proven 100% of the time.


What is the difference between a scientific law and a scientific theory?

A scientific theory is a theory that explains the scientist's observations, whereas a scientific law is a repeated pattern in the world that we have not sought an explanation for.Also, a scientific theory is proven correct in this time, but may not be correct during future times.


A theory is a hypothesis that has been proven true?

No. It can never be "proven" true. It's always open to question, and to any demonstration of its failure.But after time goes by, and no evidence has been presented to demonstrate that the hypothesis fails, and the hypothesis has made predictions that were confirmed by experiments designed to test them, then the hypothesis may be elevated to the status of a theory. But it's still waiting to be debunked.Interesting that a theory can be dis-proven in a day, but can't be proven in a thousand years. That's Science.