Environmental Science
"Ozone Hole" is a _____________

Hole in the troposphere
Hole in the hydrosphere
Destruction of ozone layer
Hole in the atmosphere

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Environmental Science
The aurora is produced by:

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

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