The noun 'popcorn' is a singular uncountable (mass) noun as a word for a substance.
An uncountable noun is quantified by a partitive noun, for example, a bag of popcorn, a cup of popcorn, a pound of popcorn, etc.
The plural form of the noun 'popcorn' is reserved for 'types of' or 'kinds of', for example, "Their selection of popcorns are buttered, caramel, and jalapeno."
Transport is both countable and uncountable as a noun.
countable
uncountable
Uncountable
The gerund painting is a countable noun, as in "There are 12 paintings in this room."
Transport is both countable and uncountable as a noun.
countable
uncountable
Uncountable
uncountable
The gerund painting is a countable noun, as in "There are 12 paintings in this room."
few is countable
countable
Countable
The noun 'steel' is an uncountable (mass) noun, a word for a substance.
he asked me if the word fire wood countable or uncountable?
Pasta is a countable noun