Stratosphere (noun)

The layer of the Earth"s atmosphere that starts at about 50 kilometers above the Earth"s surface and extends to about 500 kilometers, characterized by a very stable temperature and by the presence of ozone that protects the Earth from harmful ultraviolet rays.

Origin:

Compound word, made up of "strato" meaning layer, and "sphere" meaning a ball-shaped object. first recorded use of the word in this form was in 1902.

Examples:

1. The ozone layer, which protects the Earth from harmful ultraviolet rays, is located in the stratosphere.
2. Jet planes fly at altitudes that take them into the stratosphere.
3. The stratosphere is a layer of the Earth's atmosphere where the ozone layer is present.
4. The ozone layer is important for life on Earth because it protects us from the sun's ultraviolet rays, which are particularly intense in the stratosphere.
5. The stratosphere has a very stable temperature and is characterized by the presence of ozone that protects the Earth from harmful ultraviolet rays.