Yes, Styrofoam is a proper noun, a trademarked product of the Dow Chemical Company.
However, the word often appears in lowercase in reputable professional publications for any similar product.
A similar usage change occurred with the word mayonniase, which is no longer a proper noun.
As a name of a road , Park Avenue', it is a proper noun, and both words star with a capital letter. However, when used separately, as 'the park, or 'the avenue', they are common nouns and so not need a capital letter.
Exxon is a proper noun
Yes, the word 'Ali' is a proper noun, the name of a person.A proper noun is the name or title of a specific person, place, or thing.A proper noun is always capitalized.
Proper noun
It is a proper noun, because it is the name of a specific thing.
The noun 'Styrofoam' is an uncountable noun as a word for a substance.Some uncountable nouns for substances use a plural form exclusively for 'types of' or 'kinds of''. However, I don't know if there is more than one kind of Styrofoam.
Pencil proper or common noun
As a name of a road , Park Avenue', it is a proper noun, and both words star with a capital letter. However, when used separately, as 'the park, or 'the avenue', they are common nouns and so not need a capital letter.
Exxon is a proper noun
proper noun
Styrofoam is a mass noun, it is already plural. It is most often encountered as an adjective - i.e. a Styrofoam mug, a Styrofoam container ... and these do not have a plural just as there is no plural for "big" in 10 big mugs or 20 big containers, we just say 10 Styrofoam mugs, 20 Styrofoam containers.
Yes, the word 'Ali' is a proper noun, the name of a person.A proper noun is the name or title of a specific person, place, or thing.A proper noun is always capitalized.
proper noun
Proper noun
It is a proper noun, because it is the name of a specific thing.
it's a common noun. a proper noun would be Spider-Man.
what is trix