the letter p is just like how you said your question
Dodgeball is capitalized if it starts the sentence. But if dodgeball is used in the middle of a sentence it is not capitalized.
No it shouldn't be capitalized.
No, "methadone" should not be capitalized unless it is at the beginning of a sentence or part of a proper noun (such as a specific brand name).
No it shouldn't be capitalized.
Yes, "Middle Ages" should be capitalized when referring to that specific historical period, as it is a proper noun.
No, "secondary students" should not be capitalized in the middle of a sentence unless it is a proper noun or at the beginning of a sentence.
no
Yes.
No it shouldn't be capitalized.
No, "narwhal whale" does not need to be capitalized in the middle of a sentence unless it is part of a proper noun or title.
No, "sister" is not capitalized in the middle of a sentence unless it is used as part of the name or title that is capitalized. For example, in "I have a younger sister," "sister" would not be capitalized.
The word angels is a common plural noun. It is not capitalized unless the first word of a sentence.