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Aluminum is an abundant (2) metal (1) that has many uses (3). It comes from bauxite (4), which is an ore (5). Bauxite looks like clay (6) and contains aluminum (7) and several (8) other substances (9). Workmen extract these other substances from the bauxite (10), grind (11) the bauxite, and (1) put (12) it into pressurized (13) tanks. The other substances form a mass (14), which is removed (15) by the workers. The workmen use filters (16) and a liquid remains (17). They put it through several other processes (18), until it finally yields a chemical (19). The chemical, alumina (22), is white (21) and powdery (20). Alumina is a mixture (23) of aluminum (24) and oxygen (25). Workmen seperate the aluminum from the oxygen (26) by using electricity (27). They finally produce a light (29) metal (28). The metal has a luster (30) that is bright (31) and silvery (32) and comes in many forms (33).
Missing: Added IUs: Content errors: # 1 "extract . . . grind . . . and put . . ." [The first is a generalization; the last two are details of that generalization.] |
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