Explanation of IU's IUs in the Original
Idea Units: Student 019
Student's Original Student'sAnalyzed

     Aluminum is a very useful (3) and abundant (2) metal (1). It contains several (8) substances (9) taken from (4) the ore (5) Bauxite from aluminum is also derived (7). To form aluminum (1), the Bauxite is ground (11) and put (12) into pressurized (13) tanks until it forms a mass (14). The mass is then removed (15) and (1) filtered (16), leaving only a liquid (17). Several other processes are applied (18); finally yielding (19) a white (21), powdery (20) chemical called "alumina" (22). Alumina contains aluminum (24) and oxygen (25). In order to extract the aluminum from the chemical (26), workmen use electricity (27) to eventually produce the light (29) metal (28). The metal comes in several forms (33), however it is always bright (31) with a silvery (32) luster (30).



Missing:
# 6 "looks like clay"
# 10 "extract these other substances from the bauxite" [Implied]
#  23 "mixture" [Implied in 24 & 25]
Added IUs:
# 1 "To form aliminum"
Content errors:
# 1 "removed and filtered" [This is not two procedures.]