Which of the following planets does not have a magnetic field?
An imaginary circle around the earth halfway between the magnetic poles is the ________.
What is the stream of charged particles that emanates from the sun called?
The amount by which a compass needle deviates from true north is the angle of _______.
Which scientist was the first to propose that earth has a magnetic field?
The extent of a planet's magnetic field in space is known as a _________.
The donut shaped belts of high-speed particles trapped in Earth’s magnetic field are the ______.
The southern lights are known as aurora _________.
What is the aurora phenomenon caused by?
What causes the Earth’s magnetic field?
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