Within each layer temperature either goes up (in the stratosphere and thermosphere) or down (in the troposphere and mesosphere). Boundaries "pauses<span>" between layers are defined by where temperature stays about the same with height.
Hope this helps!
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Translucent objects allow some light to travel through them. The light does not pass directly through the materials. It changes direction many times and is scattered as it passes through. Therefore, we cannot see clearly through them and objects on the other side of a translucent object appear fuzzy and unclear.
D) activation gate - opens during depolarization
