Ask your own question, for FREE!
Physics 23 Online
OpenStudy (anonymous):

Which of the following describes Earth's magnetic field? A.always stays the same. B.regularly reverses every 100 years. C.has altered every now and then through long periods of time. D.is found only in the northern hemisphere.

OpenStudy (anonymous):

I'd say 'A'

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
Wolfwoods: The Pain Of Waiting "The short story would be that we fell in love, you left and I continued to wait for you.
7 hours ago 7 Replies 1 Medal
notmeta: balance the following equation - alumoinum chlorate --> alumninum chloride + oxyg
1 hour ago 4 Replies 1 Medal
notmeta: If \(P(A) = 0.4\), \(P(B) = 0.7\), and \(P(A \cap B) = 0.2\), what is the value o
1 day ago 9 Replies 2 Medals
Wolfwoods: "Ich liebe dich u2013 aber wu00fcrdest du mich jemals zuru00fccklieben? Wu00fcrde
1 day ago 8 Replies 2 Medals
Arizona: i'm doing a project for my Block class English and history were I create a poster
1 day ago 4 Replies 0 Medals
Breathless: I need some drawing ideas for pixel art, got any ideas?
7 hours ago 20 Replies 2 Medals
Demon25: Ann Marie, nights like this See nights like this, I sit and think Like what happe
1 day ago 6 Replies 0 Medals
KillTheNoise: Is there a way to delete a question instead of closing it?
1 day ago 3 Replies 2 Medals
KillTheNoise: What is an El Niu00f1o? Iu2019m seeing a lot of news articles about it.
1 day ago 1 Reply 1 Medal
eptic: What would be a good motto for QC?
5 hours ago 8 Replies 3 Medals
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!