Yes, "Tornado" should be capitalized as it is a specific weather event.
In general writing, such as in a sentence or paragraph, "phosphorus" does not need to be capitalized. However, if it is at the beginning of a sentence or part of a title, it should be capitalized as "Phosphorus."
The troposphere is the lowest layer of the atmosphere.
Space science should be capitalized if it is used as a proper noun or at the beginning of a sentence. Otherwise, it is generally not capitalized.
The troposphere is the lowest layer of Earth's atmosphere where weather events occur, including clouds, rain, and wind.
No. The separate levels of the atmosphere are not capitalized.
Oh, dude, you're really sweating the small stuff here. Technically, "continental breakfast" shouldn't be capitalized unless it's at the beginning of a sentence or part of a title. But, like, does it really matter that much? I mean, we're talking about breakfast, not launching a rocket into space.
No, "transition process" should not be capitalized in a sentence unless it is the first word in the sentence or part of a title.
No, the word forecast should not be capitalized in a sentence.
Yes, "PC" should be capitalized in a sentence.
Yes it should be capitalized.
Yes it should be capitalized.
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, 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 "mammogram" should not be capitalized within a sentence unless it is at the beginning of a sentence or part of a title.
Have should be capitalized if it is the beginning of a sentence. Summer should not be capitalized.
No, "methamphetamine" should not be capitalized unless it is at the beginning of a sentence.