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'.
Warm-up: common and proper nouns. â¢ A common noun names any one of a group of persons, places, things, or ideas. Common nouns do not generally begin with a. capital letter. â¢ A proper noun names a particular person, place, thing, or. idea. Proper nouns begin with capital letters.