Which of the following is a benefit of the earth's magnetic field?

a.) We can navigate better.
b.) Credit cards and ATM cards can work.
c.) Our computers work faster.
c.) More radiation from the sun reaches us.
e.) Our satellites can stay in orbit.

Question

Which of the following is a benefit of the earth's magnetic field?
 	
a.) We can navigate better.
b.) Credit cards and ATM cards can work.
c.) Our computers work faster.
c.) More radiation from the sun reaches us.
e.) Our satellites can stay in orbit.

anonymous · Answer

Can you rule out some of these?  Computers and credit cards?

anonymous · Answer

i think its d or e

anonymous · Answer

Actually, magnetism blocks some radiation from from the sun  and has nothing to do with satellites. How does a compass  work?

anonymous · Answer

i don't know.

anonymous · Answer

The needle is a magnet and it points toward the north pole approximately, due to the Earth's magnetic field. Used a lot in early days for navigation.

anonymous · Answer

okay, what does that have to do with the question?

anonymous · Answer

is it a?

anonymous · Answer

Yes, a is the answer, although compasses are not used much for navigation these days.

anonymous · Answer

oh, i seriously thought it was d, but thank you douglas.

anonymous · Answer

You are very welcome.  GPS has made compass use almost obsolete.