  Although the terms ocean and sea are often used interchangeably, a sea is generally considered to be smaller than an ocean. One definition of ocean is: a great bod â¦ y of interconnecting salt water that covers 71 percent of the Earth's surface.
Sharpie brand permanent markers. A permanent marker or indelible marker is a type of marker pen that is used to create permanent writing on an object. In general, the ink comprises a main carrier solvent, a glyceride, a pyrrolidone, a resin and a colorant, making it waterproof.
An oriented (anisotropic) material is one that has better magnetic properties in a given direction. Paramagnetic material, is a material having a permeability slightly greater than 1. A permeameter is an instrument that can measure, and often record, the magnetic characteristics of a specimen.