I don't really understand how the Earth's Magnet work. For example, when the question say the electron is moving horizontally to the east. And then i asked someone, they said the horizontal actually is the vertical. And why does the magnetic field go from south to north, isn't north to south? is the earth magnetic field line straight? How would you compare if the lightning strike a beam of electron at the equator or at the pole?? How would you apply the hand rule to determine the direction of electron traveling horizontally? If someone could explain the concept to me. Btw, i have a test tomorrow, if anyone can explain this to me today. thank you very much.