Night air cools.

Meaning: This means that the air during the night becomes colder than it was during the day.

Choice of Words: Night refers to the period of time between sunset and sunrise. Air is the mixture of gases that surrounds the Earth and is necessary for breathing. Cools means to become or make something become colder.

Alternative Expressions

The air at night is cold.

Meaning: This means that the air is not hot when it is nighttime. It's like saying, The air is cool when it is dark outside.

Choice of Words: The is used to refer to a specific thing. Air is the invisible gas that surrounds us. At night refers to the time of day when it is dark. Cold means not hot. When you put them together, "The air at night is cold" describes the temperature of the air at night.

It's chilly outside at night.

Meaning: This means that the air is slightly cold when it is nighttime outside. It's like saying, The air is a little bit cold when it is dark outside.

Choice of Words: It is used to refer to something that is not specifically named. Chilly means slightly cold. Outside means not inside a building. At night refers to the time of day when it is dark. When you put them together, "It's chilly outside at night" describes the temperature of the air outside at night.

Related Expressions