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.
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.
No it shouldn't be capitalized.
no
Yes, Siamese would be capitalized.
No.
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.
Usually, yes a phase of the moon is supposed to be capitalized.
No, it shouldn't be capitalized.
Yes it should be capitalized.
No it shouldn't be capitalized.
Yes.
no
Yes, America should be capitalized.
no
no
No, but the names of individual languages are capitalized.
Yes, Siamese would be capitalized.