Environmental Science
"A good absorber of a given wavelength of radiation is also a good emitter of that wavelength." This is a statement of:

Kirchoff's Law
The Law of Relativity
Stefan-Boltzmann's law
The First Law of Thermodynamics
Wien's Law

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Environmental Science
The aurora is produced by:

Burning oxygen caused by the intense sunlight at high altitude
The combination of molecular and atomic oxygen to form ozone
Fast-moving charged particles colliding with air molecules
Scattering of sunlight in the upper atmosphere
Reflections of sunlight by polar ice fields

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