Is the center of the Earth really molten metal?

If it were how do we honestly have a magnetic field around the Earth? Even when molten metal spins it cannot create a magnetic field. I’m just going to give a site that many will not agree with but it is interesting enough for review. Criticism is fine but just read this with an open mind and say what if? Not expecting anyone to agree with the article only want others to have an insight to it and think on it. Thanks http://www.howtosurvive2012.com This article as you can see also looks at the 2012 predictions.