Of the three basic classifications of magnetic materials, _______________ materials are metals that are most easily magnetized.

The regions formed in the molecular structure of magnetic metals are sometimes called magnetic _____.

When a magnetic material’s molecules are all lined up, and increases in current flow no longer cause increases in magnetic field strength, the material has reached _____.

If an object is placed in the field of an strong electromagnet connected to an AC line, the object will be _____.

Lodestone is a name for a naturally occurring magnetic material that is also called _____.

The three substances that form natural magnets are _____.

A lightning protection device that is grounded at one end, with the other end close to but not touching the object to be protected, is called a lightning _____.

Selenium is a(n) _____.

Static electricity refers to electrons that _____ moving.

What kind of rocks are formed from the direct cooling of magma?