Genitive Сase with the Word “сколько”

Did you know that the question word “сколько” can be used both with nouns in Genitive singular and Genitive plural? If the noun is uncountable, the Genitive singular is used (how much), if it is countable, the Genitive plural is used (how many).

Сколько времени мы будем там?
How long will we stay there?

Сколько молока ты купил?
How much milk did you buy?

Сколько кошек ты видишь на улице?
How many cats can you see on the street?

Сколько мультфильмов ты посмотрел?
How many cartoons have you watched?