Yes, Siamese would be capitalized.
No it does not have to be capitalised.
Depends on where you put it in a sentence
Earth, as in we live on the planet Earth, is supposed to be capitalized. Earth, as in the dirt we walk on, is not supposed to be capitalized.
It depends on the context of the sentence. If being used as in "He is a senior in college" then you do not capitalize. If used in conjunction with a proper noun, then it is capitalized.
Yes, Siamese would be capitalized.
No, "neighbor" should not be capitalized unless it is at the beginning of a sentence or part of a proper noun like a neighborhood name.
No it does not have to be capitalised.
If its at the beginning of a sentence then yes. But if its during a sentence then no.
Only at the beginning of the sentence.
Depends on where you put it in a sentence
No, it would not be capitalized, but it should be pluralized.
No, "adults" is not typically capitalized unless it is part of a proper noun or at the beginning of a sentence.
No, except if the word is used at the beginning of a sentence.
No, "apple crumble" is not typically capitalized unless it is at the beginning of a sentence.
No, the C in colonial does not need to be capitalized.
No, except at the beginning of a sentence because it is not a proper noun.