no the cork will sink
it may end up pointing either north or south
no the cork will sink
Yes
Asteroids
ice bergs
You think probable to magnetic levitation due to interaction of magnetic fields.
it allows the saragassum to float freely like a blanket on the surface of the water.
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.
Fill the container about half full of water. Float a leaf on the surface of the water, and float the needle on the leaf. That'll be a beautiful demonstration. I think I'll make one, and I thank you for the idea.
yes or no it depends how big the magnet is
A superconductor
Yes
No. They are microscopic plants that float freely in seawater.
Asteroids
No, opposite polarities attract, alike polarities repel.
no clouds are are a gas which is why they can float around freely in the sky.
electrons float freely between atoms
"calving"
for this you need an iron pin, a magnet and a plastic cap that can float on water. Magnetize the iron pin by rubbing a magnet on it continuously in one direction for about 15 minutes. Now place the needle in the centre of the plastic cap and hold it in position with cello tape. take a container containing water and put the cap in it such that it floats on it. The pin will always point in north south direction. but the compass can be confused by a magnet placed near it.