That he either found it to be incorrect or heard from a majority of other scientists working in the same field of study that the hypothesis isn't true. Though it's almost always the first one I said.
It means that he or she does not find the hypothesis to be plausible.
It means there is no reason why he should reject it, whether because there is no evidence to the contrary or because an experiment set up to test it affirmed that hypothesis.
There is no truth in science. Truth is only meaningful in math, philosophy, religion and logic. A hypothesis can never be true. You either accept or reject a hypothesis. You accept the null hypothesis if you fail to reject it.
Because he could not explain how the continents moved.
A hypothesis doesn't necessarily need to be correct. After a scientist has conducted an experiment and discovered that their hypothesis is incorrect, they still have gained the knowledge and the results from their experiment---as well as the correct answer, in some cases. They can use the results from the experiment that tested the original hypothesis to form a new experiment.
It means that the experiment is consistent with the hypothesis. It adds to the credibility of the hypothesis.
It means that she or he has to accept that the existing hypothesis appears to be true.
the hypothesis has not been proven wrong.
It means there is no reason why he should reject it, whether because there is no evidence to the contrary or because an experiment set up to test it affirmed that hypothesis.
It means there is no reason why he should reject it, whether because there is no evidence to the contrary or because an experiment set up to test it affirmed that hypothesis.
Depending on the results of that test, either accept or reject that hypothesis.
alternitive hypothesis
the hypothesis has not been proven wrong.
because he didn't know how the tectonic plates/continents moved
It means that he or she does not find the hypothesis to be plausible.
Because the caculated strength of rock made such movement of earth's crust seemed impossible.
It means there is no reason why he should reject it, whether because there is no evidence to the contrary or because an experiment set up to test it affirmed that hypothesis.