Environmental Science
The air temperature is 45o F, the wind is blowing at 30 MPH, and the wind chill temperature is 15o F. These conditions would be equivalent to:

A 30o F air temperature and 45 MPH winds
A 15o F air temperature and 30 MPH winds
A 30o F air temperature and 15 MPH winds
A 15o F air temperature and 0 MPH winds

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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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