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Aluminum is a abundant (2) metal (1). It comes from bauxite (4) and has many uses (3). Bauxite is an ore (5), which looks like clay (6). Bauxite contains aluminium (7) and several (8) other substances (9). Workmen extract these other substances from bauxite (10) and (1) grind (11) them. It is then placed (12) in pressured (13) tanks. The other substanes form a mass (14), which is removed (15). They use filters (16) so a liquid remains (17). It finally yields (19) a white (21), powdery (20) chemical. The chemical is alumina (22). It is a mixture (23) which contains aluminum (24) and oxygen (25). Workmen separate the aluminum from the oxygen (26), by using electricity (27). They finally produce a metal (28) with a luster. (1) The light (29) metal has bright (31), slivery (32) luster (30). This metal comes in many forms (33).
Missing: # 18 "several othwer processes"Added IUs: # 1 "with a luster."Content errors: # 1 "and" [Implies two processes, but the grinding is part of the extraction.] |
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