Question: ionosphere is also known as?
Answer: The ionosphere (/aɪˈɒnəˌsfɪər/) is the ionized part of Earth's upper atmosphere, from about 60 km (37 mi) to 1,000 km (620 mi) altitude, a region that includes the thermosphere and parts of the mesosphere and exosphere. ... The region below the ionosphere is called neutral atmosphere or neutrosphere.