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The color of the aurora depends on the altitude that it occurs in
the earth has a magnetic field
True
True
False
False
current flowing through a wire generated a magnetic field
True
stronger near the poles
The earth's magnetic poles never change
the earth has a magnetic field
True
True
False
False
current flowing through a wire generated a magnetic field
True
stronger near the poles
The direction of the current through a wire does not affect the magnetic field.
the earth has a magnetic field
True
True
False
False
current flowing through a wire generated a magnetic field
True
stronger near the poles
Magnetic fields are used to store information on computer hard drives.
the earth has a magnetic field
True
True
False
False
current flowing through a wire generated a magnetic field
True
stronger near the poles
Hans Christian Oersted
the earth has a magnetic field
True
True
False
False
current flowing through a wire generated a magnetic field
True
stronger near the poles
Dr. James Van Allen discovered
the earth has a magnetic field
True
True
False
False
current flowing through a wire generated a magnetic field
True
stronger near the poles
Nearly all power plants use electromagnetism to produce electricity
the earth has a magnetic field
True
True
False
False
current flowing through a wire generated a magnetic field
True
stronger near the poles
A magnets strength is
the earth has a magnetic field
True
True
False
False
current flowing through a wire generated a magnetic field
True
stronger near the poles
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