The caffeine content of coffee varies greatly, depending on the beans, how they're roasted, and other factors, but the average for an 8-ounce cup is about 100 milligrams (mg).
No, 'cat' is a common noun, a word for any cat of any kind. A proper noun is the name of a person, a place, a thing, or a title; for example: Cat Deeley, host of TV series 'So You Think You Can Dance'.
Nouns are people, places, things, and ideas. Common nouns are general nouns while proper nouns are specific ones. Common nouns do not need to be capitalized, but proper nouns do. To unlock this lesson you must be a Study.com Member. Create your account.