No. It is not a proper noun.
Yes, it's a proper noun, and is treated like the name of a person. Thus: Mt. Vesuvius.
The arenal volcano is a cindercone volcano not a composite.
a shield volcano
Yes, the word "Venus" is capitalized because it is the name of a planet.
Yes, "Mount Vesuvius" should be capitalized in a sentence as it is a proper noun referring to a specific volcano located in Italy.
No. It is not a proper noun.
If you are talking about the caldera formed by a volcano collapsing then no it shouldn't be capitalized.
The noun 'Mayon Volcano' is a proper noun, the name of a specific volcano. A proper noun is always capitalized. Examples of common nouns for the proper noun 'Mayon Volcano' are: volcano mountain landform feature
Yes, it's a proper noun, and is treated like the name of a person. Thus: Mt. Vesuvius.
"Can" is typically not capitalized in sentences unless it is the first word or part of a proper noun.
No, seasons are not 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.