The Widmanstätten Pattern Uncovered by Acid Etching of the Surfaces

Multiple Choice

The Widmanstätten pattern uncovered by acid etching of the surfaces of many iron meteorites consists of:

A) fracture lines, created by the impact that knocked the meteoroid off the parent asteroid.
B) large crystals, formed as the iron cooled slowly over many millions of years.
C) small holes and bubbles, created by partial melting of the meteorite as it entered Earth's atmosphere.
D) minute crystals, formed when the iron cooled quickly in the vacuum of space.