For a period of 4000 years or so while Earth's magnetic field was reversing direction, the planet has little or no magnetic field. What is one consequence of this?
A) more coronal mass ejections
B) brighter auroras
C) increased depletion of its atmosphere
D) a decreased rotation rate

Question

Quizplus · Accepted Answer

During periods when Earth's magnetic field is weak or reversing, the planet is less protected from solar and cosmic radiation. This can lead to increased atmospheric ionization and potentially to the stripping away or depletion of the atmosphere by solar wind and energetic particles from space.

For a Period of 4000 Years or So While Earth's