Flag is capitalized because it is our United States Flag. If you said the flag, it would be lower case.
yes of coures
Yes, "Flag" should be capitalized when referring to the American Flag, as it is a proper noun.
No, seasons are not capitalized.
"Can" is typically not capitalized in sentences unless it is the first word or part of a proper noun.
The compound noun Old Glory is a proper noun, a nickname for the American flag. A nickname is a name for a specific person or thing. A proper noun is always capitalized.
Yes, "Spring 2009" should be capitalized because it is a specific season and year.
No, keywords do not have to be capitalized.
No it's not capitalized.
No it shouldn't be capitalized.
Wikipedia is capitalized.
No, it is not capitalized.
Occupations are not typically capitalized unless they are used as part of a title before a name (e.g., President Obama). Otherwise, they are usually written in lowercase (e.g., teacher, doctor).