What is another word for heterosphere?
Pronunciation: [hˈɛtɹə͡ʊsfˌi͡ə] (IPA) 
The term heterosphere is used to describe the uppermost layer of the Earth's atmosphere. It is a region where the gases that make up the atmosphere are separated based on their molecular weight. The heterosphere is divided into two distinct layers - the exosphere and the mesosphere. Synonyms for the word heterosphere include upper atmosphere, high altitude region, and stratopause. Other related terms include ionosphere, thermosphere, and mesopause. Each of these terms describes a specific region within the Earth's atmosphere, but they are all related to the heterosphere and the important role it plays in the Earth's overall climate and weather patterns.
