The ____ process led to a cheap, practical production of steel.

The ____ process led to a cheap, practical production of steel.
 
  A) Bessemer
  B) Brittner
  C) Bayer
  D) Little

Question 2

The females have a pouch called a ____________________ in which the young are raised during early infancy.
 
  Fill in the blank(s) with correct word

Question 3

A high-quality ore contains ____ percent metallic iron.
 
  A) no more than 12
  B) approximately 20
  C) no less than 95
  D) at least 60

Question 4

Out-of-the-pouch young sugar gliders are called ____________________.
 
  Fill in the blank(s) with correct word

Question 5

The USGS estimates world iron ore resources at ____ BMT of crude ore.
 
  A) more than 265
  B) no more than 100
  C) over 155
  D) less than 90