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.
No it shouldn't be capitalized.
no
Yes, America should be capitalized.
no
Yes, "Senior Class Picnic" should be capitalized as it is a proper noun referring to a specific event.
Yes, "Pterodactyl" is supposed to be capitalized as it is a proper noun referring to a specific genus of pterosaur.
No, but the names of individual languages are capitalized.
Yes, Siamese would be capitalized.
Yes, "Senior Prom" should be capitalized as it is a proper noun referring to a specific event or occasion in a school setting.