No, it shouldn't all be uppercase, and it doesn't need to be capitalized unless it is the first word in a sentence or part of a title.
The word "chemistry" should be capitalized only when it is at the beginning of a sentence or part of a title.
Generally not unless it is the first word in a sentence.
No, "magnetism" should not be capitalized unless it is at the beginning of a sentence or part of a title.
No, the word "equator" should not be capitalized unless it appears at the beginning of a sentence or as part of a proper noun (e.g., Equator Line Cafe).
Yes, the word "astronaut" should be capitalized as it is a proper noun referring to a specific job title or profession.
No, it shouldn't all be uppercase, and it doesn't need to be capitalized unless it is the first word in a sentence or part of a title.
Astronomy is a long word.
No, the word forecast should not be capitalized in a sentence.
No, the word "novel" does not have to be capitalized in every sentence. It should be capitalized only if it is the first word in a sentence or part of a title.
No, the word "fifteen" should not be capitalized in a date within a sentence unless it is the first word of the sentence.
No, the word basketball is not a proper noun and so it does not get capitalized in a sentence unless it is the first word of that sentence.
My brother is studying astronomy.
The word "victim" is not typically capitalized in a sentence unless it is at the beginning of a sentence or part of a title.
No, the word "mammogram" should not be capitalized within a sentence unless it is at the beginning of a sentence or part of a title.
No, the word "dear" is not capitalized in the sentence "I'm home dear."
No, the word "century" is not capitalized unless it begins a sentence. So "thirteenth century" would not be capitalized in the middle of a sentence.