Paleomagnetism

• the stripes show the earth's _____ is not _____?

  polarity, constant
• echo sounds are used to locate ____ and showed existence of a ___ ____ _____?

  submarines , mid atlantic ridge
• paleomagnetism shows the ___ ___of ____, that are repeating stripes, they are _____ _____, lined up to indicate ___ ____?

  curious pattern , magnetism, iron filings, north pole