Question

Which one of the following is wrong about heterosphere?

• A. Oxygen and nitric oxide occur in an ionized state caused by ultraviolet radiations.
• B. The lower sub-region of heterosphere is called as ionosphere.
• C. Thermosphere contains mixture of nitrogen and oxygen in the ratio of 1 : 1.
• D. The temperature of heterosphere is about 200${}^o$ F.

Answer 1

Answer: (B)

The lower sub-region of heterosphere is called as ionosphere.

The heterosphere is the upper portion of the Earth's atmosphere that lies above the homosphere ( made up of the troposphere, the stratosphere, mesosphere, and the lowest part of the thermosphere). On average the heterosphere begins at an altitude of about 80 km. The chemical composition of heterosphere varies with altitude and includes the exosphere and most of the thermosphere. The ionosphere is made up of thermosphere and parts of exosphere and mesosphere.