|
||||||
|
Aluminum is a useful (3) and abundant (2) metal (1) which comes from (4) bauxite. Bauxite is an ore (5) that looks like clay (6), and contains several (8) other substances (9). workmen extract these other substances from bauxite (10) by putting (12) it in pressurized (13) tanks which (1) grind (11) it. The other substances form a mass (14) which is removed (15) by using filters (16), and a liquid remains (17) in the tank. Using several other processes (18), it finally yields (19) a white (21), powdery (20), chemical called alumina (22). Alumina is a mixture (23) that contains aluminum (24) and oxygen (25). The oxygen and aluminum are separated (26) by using electricity (27). A light (29), bright (31), and silvery (32) metal (28) is finally produced. This metal comes in many forms (33).
Missing: # 7 "contains aluminum" [Implied]Added IUs: Content errors: # 1 "which grind it" [The tanks don't grind the bauxite.] |
||||||