In order to answer your question we need to know the theory
No, "will be had" is not a correct grammar. The correct grammar would be "will have."
Depends on what you think
"I think I caught a cold." would be correct.
"He thinks" is correct. The verb "thinks" agrees with the singular subject "he."
Yes, "think of" is correct and commonly used in English. It is often used to suggest considering or imagining something. For example, "Think of a solution to the problem" or "Think of your favorite childhood memory."
The correct spelling is 'theory'.
a theory
"What do you think" is correct.
In science, a theory is, by definition, proven and accepted as fact.
Because it can't be proved to be correct, and therefore it is a theory - unproved
All answers are correct
It expands
It's correct
A scientific theory is an idea that is supported by a hypothesis. Once the theory is proven to be permanently correct, it is a law or fact.
The correct steps for the scientific method are: Observation Hypothesis Theory Scientific Law
That is the correct spelling of "thinking."
The correct equation is E = mc2. It's Einstein's Theory of Relativity.