Although you would like for your date to have a magnetic personality, the field of magnetic dating is about something else altogether. The idea is that magnetic rocks get very hot in or near a fire and then when they cool down they take on the magnetic field of the earth at whatever time they cooled. The reason heat is needed is because
A) There needs to be enough thermal fluctuations to disorient the magnetic domains and cause the rock to be non - magnetic.
B) There needs to be enough thermal fluctuations to disorient the magnetic domains and cause the rock to be magnetic.
C) The fire causes a chemical reaction on the surface of the rock that preserves magnetic field direction.
D) Fire is just dramatic.

Question

Quizplus · Accepted Answer

When rocks are heated, the thermal energy causes the magnetic domains to become disoriented, making the rock temporarily non-magnetic. Upon cooling, the domains realign with the Earth's magnetic field, preserving its direction at that time.

Although You Would Like for Your Date to Have a Magnetic