Countable nouns are things which can be counted. That means that when there is more than one of them, you need to add 's'. Also, when a countable noun is singular an article (a/an/the) is often used with it.
e.g. There are too many factories.
Non-Countable Nouns are usually things which cannot be counted, such as rice or water. Non-countable nouns only have a singular form, but we either use the word "some" or nothing at all instead of an article.
e.g. There is too much smoke.
Complete these statements with the correct missing words: