Cork is wood, therefore it is not magnetic.
A corkboard is board that is made from cork. It is manly used for bulletin boards or presentation boards. Newer versions are not made of cork anymore. They are magnetic and made of metal.
If a magnet is "left to float freely", it will align to any magnetic field - or more precisely, to the horizontal component of the magnetic field. And if there is no stronger magnet nearby, this field will be governed by Earth's magnetic field.
Cork comes from a cork tree :]
cork comes from a cork tree
cork is a type of color like brownish
'cork' is the bark of the cork oak tree.
Cork for bottles is made from cork trees.
Cork is a part of the bark on a Cork Oak Tree.
Cork comes from trees which are eukaryotic
it is heavier and more aerodynamic
The cork master is the master of the cork because he knows which wine goes with fish or pork...