Noncount Nouns

Noncount nouns refer to anything that cannot be counted such as:
a) Substances: water, air, sugar
b) Abstractions: luck, bravery, beauty
c)  Fields of study or sports: chemistry, baseball
 
Noncount nouns are usually preceded by words such as some, much, a little, and are always expressed in the singular form with a few exceptions.

You were using a lot of sugar(vs. you were using a lot of eggs)
She needs some encouragement before taking the test.

Note:
Noncount nouns that refer to abstractions, sports, fields of study usually are not preceded by an article or any other word.

He watches baseball every weekend.
I do not like physics
The company expects loyalty from its employees.