I looking at a practice test in my book and it has this question:
If Earth’s magnetic field did not occasionally reverse polarity:
a) polar wandering curves would not work
b)compasses would not work
c) the sea floor would not produce magnetic strips
d) continental drift would not occur
e) paleomagnetic analysis of a rock would not give the direction to the pole
I am leaning towards C or D. Does anyone have an input to this question?
2007-10-12 15:32:04 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Try to visit this site..hope it will help you.
Earth's Inconstant Magnetic Field
... field, typical of the long years between polarity reversals. ... sort of complicated magnetic field Earth has during the upheaval of a reversal. [ more] ...science.nasa.gov/headlines/y2003/29dec_magneticfield.htm - 18k - Cached
2007-10-12 16:17:36 · answer #1 · answered by jhulia g 4 · 0⤊ 1⤋
A. charged Magnetic particles in the core of the earth would move too far towards the ends of the poles. Usually, due to rotation, the ionic charge is reset by near seperation of the overall magnetic charge. Polar wandering curves means the Earth is curved from semi elipses at the pole, which would become greater and eventually form a concave curve if the reverse didn't mix the molten mass.
2007-10-12 21:07:53 · answer #2 · answered by J R 3 · 0⤊ 0⤋
The question should be, what is going to happen when it does change, because humans weren't around at the last flip. ( but c is true, no magnetic flips, no magnetic strips on the sea floor) Also Continental drift is caused by the fact we "float" on magma and lighter rocks. not magnetic polarity.
2007-10-12 15:36:53 · answer #3 · answered by punch 7 · 0⤊ 0⤋
the effects does not be any distinctive than any of the preveious pole reversals of the Earth, as a results of fact it takes thousands of years to end, quite a few image voltaic polarity 'flips' have got here approximately in the time of each and each Earthly one.
2016-10-22 05:25:18 · answer #4 · answered by Erika 4 · 0⤊ 0⤋
I'm thinking B . Seeing as tho during a reversal, the main field weakens, almost vanishes, and then reappears with opposite polarity. Afterward, compass needles that normally point north would point south.
2007-10-12 15:37:05 · answer #5 · answered by Anonymous · 0⤊ 1⤋
C because it is the only thing directly caused by shifts and polar wandering wouldn't occur.
2007-10-12 15:35:03 · answer #6 · answered by bravozulu 7 · 1⤊ 0⤋