Are the exosphere and the thermosphere same?

Question:

Earth's Upper Atmosphere:

The upper atmosphere of Earth is not well delineated at the top because it simply fades into space, but is generally defined by extremely thin air that only holds about 0.01% of the atmosphere's mass despite being thicker than the lower atmosphere. Many satellites orbit within the upper atmosphere, and the photodissociation of molecules by very short wavelengths of solar radiation creates the ionosphere in the lower part of this layer.

Answer and Explanation: 1