Theories change because more/different information is discovered.
the past has been, the future will be done. do we really need to know the past to know the future? If we knew the exact date of Christopher Columbus would that change the future? You don't know what matters from the past enough to know how it will affect the future.
Cultures change in response to changes around them.
The geologic principle that the same geologic processes that operate today operated in the past to change Earth's surface.
Living in modern times I like a sudden change in time and you know the earth is either in the past or present
The word worthy is an adjective. In the English languague, only verbs have a past tense. Adjectives don't. So whether you are saying I am worthy, or I was worthy, or I am going to be worthy, or I should have been worthy, the word worthy does not change.
no such theories exist.
How do scientific theories develop and change?
no
recurring-phase theories and sequential-stage theories
Yes.
Because our society develops and further testing can disprove theories.
Yes
They shouldn't.
big bang theory
As more and more data is collected and evaluated on a topic, scientists' theories or hypothesis may change based on the new information.
The past tense of change is changed.
There is no such thing as a "scientic theory".