Describe the three types of magnets

Permanent Magnets are always magnetic.

Temporary Magnets loose their magnetizing power after the source is removed. (outside a magnetic field)

Electromagnets are made by sending electric coil around an iron rod. (I.e. Nail, coil, and batteries can pick up paperclips)

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.