Environmental Science
The aurora is produced by:

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

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Environmental Science
Which of the following helps to explain why even though northern latitudes experience 24 hours of sunlight on June 22, they are not warmer than latitudes further south?

Some of the sun's energy is reflected by snow and ice in the northern latitudes
Increased cloud cover reflects solar energy in the northern latitudes
Solar energy is spread over a larger area in northern latitudes
All of these
Solar energy is used to melt frozen soil in the northern latitudes

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