What are the nouns in this sentence?

The air is cold because the window is open

air, window

The nouns in the sentence are:

1. air
2. window

To identify the nouns in a sentence, you need to look for words that represent people, places, things, or ideas. In the sentence "The air is cold because the window is open," the nouns are:

1. Air: It represents a thing.
2. Window: It represents a thing.

These two words are the nouns in the sentence.